diff --git a/taiga/locale/ca/LC_MESSAGES/django.po b/taiga/locale/ca/LC_MESSAGES/django.po
index 9deffb7e..d643b4f8 100644
--- a/taiga/locale/ca/LC_MESSAGES/django.po
+++ b/taiga/locale/ca/LC_MESSAGES/django.po
@@ -9,8 +9,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Catalan (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/ca/)\n"
@@ -188,7 +188,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -349,7 +349,7 @@ msgid "Error in filter params types."
 msgstr ""
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr ""
 
@@ -480,62 +480,6 @@ msgstr "Es necessita arxiu dump."
 msgid "Invalid dump format"
 msgstr "Format d'arxiu dump invàlid"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr ""
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr ""
@@ -555,14 +499,103 @@ msgstr "Conté camps personalitzats invàlids."
 msgid "Name duplicated for the project"
 msgstr ""
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr ""
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr ""
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr ""
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr ""
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr ""
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr ""
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr ""
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr ""
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr ""
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr ""
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr ""
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr ""
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr ""
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr ""
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr ""
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr ""
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1148,6 +1181,15 @@ msgstr "Administrar valors de projecte"
 msgid "Admin roles"
 msgstr "Administrar rols"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "Amo"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Arguments incomplets."
@@ -1194,14 +1236,6 @@ msgstr ""
 msgid "Project ID not matches between object and project"
 msgstr ""
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "Amo"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2359,39 +2393,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Opcions per defecte"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Estatus d'històries d'usuari"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Punts"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Estatus de tasques"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Estatus d'incidéncies"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Tipus d'incidéncies"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Prioritats"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Severitats"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Rols"
 
diff --git a/taiga/locale/de/LC_MESSAGES/django.po b/taiga/locale/de/LC_MESSAGES/django.po
index d38d46fd..7b75e1f9 100644
--- a/taiga/locale/de/LC_MESSAGES/django.po
+++ b/taiga/locale/de/LC_MESSAGES/django.po
@@ -17,8 +17,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: German (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/de/)\n"
@@ -218,7 +218,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -381,7 +381,7 @@ msgid "Error in filter params types."
 msgstr "Fehler in Filter Parameter Typen."
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'project' muss ein Integer-Wert sein."
 
@@ -535,62 +535,6 @@ msgstr "Exportdatei erforderlich"
 msgid "Invalid dump format"
 msgstr "Ungültiges Exportdatei Format"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "Fehler beim Importieren der Projektdaten"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "Fehler beim Importieren der Listen von Projektattributen"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr "Fehler beim Importieren der vorgegebenen Projekt Attributwerte "
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "Fehler beim Importieren der Kundenattribute"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "Fehler beim Importieren der Rollen"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "Fehler beim Importieren der Mitgliedschaften"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "Fehler beim Import der Sprints"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "Fehler beim Importieren von Wiki Seiten"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "Fehler beim Importieren von Wiki Links"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "Fehler beim Importieren der Tickets"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "Fehler beim Importieren der User-Stories"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "Fehler beim Importieren der Aufgaben"
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "Fehler beim Importieren der Schlagworte"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "Fehler beim Importieren der Chroniken"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" wurde in diesem Projekt nicht gefunden"
@@ -610,14 +554,103 @@ msgstr "Enthält ungültige Benutzerfelder."
 msgid "Name duplicated for the project"
 msgstr "Der Name für das Projekt ist doppelt vergeben"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "Fehler beim Importieren der Projektdaten"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "Fehler beim Importieren der Rollen"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "Fehler beim Importieren der Mitgliedschaften"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "Fehler beim Importieren der Listen von Projektattributen"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr "Fehler beim Importieren der vorgegebenen Projekt Attributwerte "
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "Fehler beim Importieren der Kundenattribute"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "Fehler beim Import der Sprints"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "Fehler beim Importieren der User-Stories"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "Fehler beim Importieren der Aufgaben"
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "Fehler beim Importieren der Tickets"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "Fehler beim Importieren von Wiki Seiten"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "Fehler beim Importieren von Wiki Links"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "Fehler beim Importieren der Schlagworte"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "Fehler beim Importieren der Chroniken"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Fehler beim Erzeugen der Projekt Export-Datei "
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Fehler beim Laden von Projekt Export-Datei"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1338,6 +1371,15 @@ msgstr "Administrator Projekt Werte"
 msgid "Admin roles"
 msgstr "Administrator-Rollen"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "Besitzer"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Unvollständige Argumente"
@@ -1384,14 +1426,6 @@ msgstr "Teil-Aktualisierungen sind nicht unterstützt"
 msgid "Project ID not matches between object and project"
 msgstr "Nr. unterschreidet sich zwischen dem Objekt und dem Projekt"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "Besitzer"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2831,39 +2865,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Voreingestellte Optionen"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Status für User-Stories"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Punkte"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Aufgaben Status"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Ticket Status"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Ticket Arten"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Prioritäten"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Gewichtung"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Rollen"
 
diff --git a/taiga/locale/en/LC_MESSAGES/django.po b/taiga/locale/en/LC_MESSAGES/django.po
index 866f8483..4cde7d23 100644
--- a/taiga/locale/en/LC_MESSAGES/django.po
+++ b/taiga/locale/en/LC_MESSAGES/django.po
@@ -7,7 +7,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
 "PO-Revision-Date: 2015-03-25 20:09+0100\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Taiga Dev Team <support@taiga.io>\n"
@@ -180,7 +180,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -341,7 +341,7 @@ msgid "Error in filter params types."
 msgstr ""
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr ""
 
@@ -469,62 +469,6 @@ msgstr ""
 msgid "Invalid dump format"
 msgstr ""
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr ""
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr ""
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr ""
@@ -544,14 +488,103 @@ msgstr ""
 msgid "Name duplicated for the project"
 msgstr ""
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr ""
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr ""
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr ""
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr ""
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr ""
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr ""
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr ""
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr ""
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr ""
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr ""
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr ""
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr ""
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr ""
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr ""
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr ""
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr ""
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1121,6 +1154,15 @@ msgstr ""
 msgid "Admin roles"
 msgstr ""
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr ""
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr ""
@@ -1167,14 +1209,6 @@ msgstr ""
 msgid "Project ID not matches between object and project"
 msgstr ""
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr ""
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2326,39 +2360,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr ""
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr ""
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr ""
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr ""
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr ""
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr ""
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr ""
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr ""
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr ""
 
diff --git a/taiga/locale/es/LC_MESSAGES/django.po b/taiga/locale/es/LC_MESSAGES/django.po
index 7538d688..ec287179 100644
--- a/taiga/locale/es/LC_MESSAGES/django.po
+++ b/taiga/locale/es/LC_MESSAGES/django.po
@@ -16,8 +16,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Spanish (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/es/)\n"
@@ -205,7 +205,7 @@ msgstr "Adjunta una imagen válida. El fichero no es una imagen o está dañada.
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr "Elemento bloqueado"
 
@@ -369,7 +369,7 @@ msgid "Error in filter params types."
 msgstr "Error en los típos de parámetros de filtrado"
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'project' debe ser un valor entero."
 
@@ -522,62 +522,6 @@ msgstr "Se necesita el fichero con los datos exportados"
 msgid "Invalid dump format"
 msgstr "Formato de fichero de exportación inválido"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "error importando los datos del proyecto"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "error importando la listados de valores de attributos del proyecto"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr "error importando los valores por defecto de los atributos del proyecto"
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "error importando los atributos personalizados"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "error importando los roles"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "error importando los miembros"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "error importando los sprints"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "error importando las páginas del wiki"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "error importando los enlaces del wiki"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "error importando las peticiones"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "error importando las historias de usuario"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "error importando las tareas"
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "error importando las etiquetas"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "error importando los timelines"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\"  no se ha encontrado en este proyecto"
@@ -597,14 +541,103 @@ msgstr "Contiene attributos personalizados inválidos."
 msgid "Name duplicated for the project"
 msgstr "Nombre duplicado para el proyecto"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "error importando los datos del proyecto"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "error importando los roles"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "error importando los miembros"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "error importando la listados de valores de attributos del proyecto"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr "error importando los valores por defecto de los atributos del proyecto"
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "error importando los atributos personalizados"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "error importando los sprints"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "error importando las historias de usuario"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "error importando las tareas"
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "error importando las peticiones"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "error importando las páginas del wiki"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "error importando los enlaces del wiki"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "error importando las etiquetas"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "error importando los timelines"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Erro generando el volcado de datos del proyecto"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Error cargando el volcado de datos del proyecto"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1318,6 +1351,15 @@ msgstr "Administrar valores de proyecto"
 msgid "Admin roles"
 msgstr "Administrar roles"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "Dueño"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Argumentos incompletos"
@@ -1366,14 +1408,6 @@ msgstr "La actualización parcial no está soportada."
 msgid "Project ID not matches between object and project"
 msgstr "El ID de proyecto no coincide entre el adjunto y un proyecto"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "Dueño"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2766,39 +2800,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Opciones por defecto"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Estados de historia de usuario"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Puntos"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Estado de tareas"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Estados de peticion"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Tipos de petición"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Prioridades"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Gravedades"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Roles"
 
diff --git a/taiga/locale/fi/LC_MESSAGES/django.po b/taiga/locale/fi/LC_MESSAGES/django.po
index 42a4be30..4034a724 100644
--- a/taiga/locale/fi/LC_MESSAGES/django.po
+++ b/taiga/locale/fi/LC_MESSAGES/django.po
@@ -9,8 +9,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Finnish (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/fi/)\n"
@@ -190,7 +190,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -351,7 +351,7 @@ msgid "Error in filter params types."
 msgstr "Error in filter params types."
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'project' must be an integer value."
 
@@ -505,62 +505,6 @@ msgstr "Tarvitaan tiedosto"
 msgid "Invalid dump format"
 msgstr "Virheellinen tiedostomuoto"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "virhe projektidatan tuonnissa"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "virhe atribuuttilistan tuonnissa"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr "virhe oletusarvojen tuonnissa"
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "virhe omien arvojen tuonnissa"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "virhe roolien tuonnissa"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "virhe jäsenyyksien tuonnissa"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "virhe kierroksien tuonnissa"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "virhe wiki-sivujen tuonnissa"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "virhe viki-linkkien tuonnissa"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "virhe pyyntöjen tuonnissa"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "virhe käyttäjätarinoiden tuonnissa"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "virhe tehtävien tuonnissa"
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "virhe avainsanojen sisäänlukemisessa"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "virhe aikajanojen tuonnissa"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" ei löytynyt tästä projektista"
@@ -580,14 +524,103 @@ msgstr "Sisältää vieheellisiä omia kenttiä."
 msgid "Name duplicated for the project"
 msgstr "Nimi on tuplana projektille"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "virhe projektidatan tuonnissa"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "virhe roolien tuonnissa"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "virhe jäsenyyksien tuonnissa"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "virhe atribuuttilistan tuonnissa"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr "virhe oletusarvojen tuonnissa"
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "virhe omien arvojen tuonnissa"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "virhe kierroksien tuonnissa"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "virhe käyttäjätarinoiden tuonnissa"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "virhe tehtävien tuonnissa"
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "virhe pyyntöjen tuonnissa"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "virhe wiki-sivujen tuonnissa"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "virhe viki-linkkien tuonnissa"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "virhe avainsanojen sisäänlukemisessa"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "virhe aikajanojen tuonnissa"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Virhe tiedoston luonnissa"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Virhe tiedoston latauksessa"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1277,6 +1310,15 @@ msgstr "Hallinnoi projektin arvoja"
 msgid "Admin roles"
 msgstr "Hallinnoi rooleja"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "omistaja"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Puutteelliset argumentit"
@@ -1323,14 +1365,6 @@ msgstr ""
 msgid "Project ID not matches between object and project"
 msgstr "Projekti ID ei vastaa kohdetta ja projektia"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "omistaja"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2728,39 +2762,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Oletusoptiot"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Käyttäjätarinatilat"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Pisteet"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Tehtävien tilat"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Pyyntöjen tilat"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "pyyntötyypit"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Kiireellisyydet"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Vakavuudet"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Roolit"
 
diff --git a/taiga/locale/fr/LC_MESSAGES/django.po b/taiga/locale/fr/LC_MESSAGES/django.po
index f84c878e..61fa72db 100644
--- a/taiga/locale/fr/LC_MESSAGES/django.po
+++ b/taiga/locale/fr/LC_MESSAGES/django.po
@@ -17,13 +17,14 @@
 # Regis TEDONE <regis.tedone@gmail.com>, 2015
 # Sébastien Talbot <sebastien@appventus.com>, 2016
 # Stéphane Mor <stephanemor@gmail.com>, 2015
+# Thierno Rignoux <t.rignoux@gmail.com>, 2016
 # William Godin <williamgodin@gmail.com>, 2015
 msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: French (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/fr/)\n"
@@ -214,7 +215,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr "Élément bloqué"
 
@@ -372,14 +373,14 @@ msgstr "Erreur de précondition"
 
 #: taiga/base/exceptions.py:217
 msgid "No room left for more projects."
-msgstr ""
+msgstr "Limite de projets atteinte."
 
 #: taiga/base/filters.py:79 taiga/base/filters.py:444
 msgid "Error in filter params types."
 msgstr "Erreur dans les types de paramètres de filtres"
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'project' doit être une valeur entière."
 
@@ -539,63 +540,6 @@ msgstr "Fichier de dump obligatoire"
 msgid "Invalid dump format"
 msgstr "Format de dump invalide"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "Erreur lors de l'importation de données"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "erreur lors de l'importation des listes des attributs de projet"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr ""
-"erreur lors de l'importation des valeurs par défaut des attributs de projet"
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "Erreur à l'importation des champs personnalisés"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "Erreur à l'importation des rôles"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "Erreur à l'importation des groupes d'utilisateurs"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "Erreur lors de l'importation des sprints."
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "Erreur à l'importation des pages Wiki"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "Erreur à l'importation des liens Wiki"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "erreur à l'importation des problèmes"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "erreur à l'importation des histoires utilisateur"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "Erreur lors de l'importation des tâches."
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "erreur lors de l'importation des mots-clés"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "erreur lors de l'import des timelines"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" non trouvé dans the projet"
@@ -615,14 +559,104 @@ msgstr "Contient des champs personnalisés non valides."
 msgid "Name duplicated for the project"
 msgstr "Nom dupliqué pour ce projet"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "Erreur lors de l'importation de données"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "Erreur à l'importation des rôles"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "Erreur à l'importation des groupes d'utilisateurs"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "erreur lors de l'importation des listes des attributs de projet"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr ""
+"erreur lors de l'importation des valeurs par défaut des attributs de projet"
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "Erreur à l'importation des champs personnalisés"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "Erreur lors de l'importation des sprints."
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "erreur à l'importation des histoires utilisateur"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "Erreur lors de l'importation des tâches."
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "erreur à l'importation des problèmes"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "Erreur à l'importation des pages Wiki"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "Erreur à l'importation des liens Wiki"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "erreur lors de l'importation des mots-clés"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "erreur lors de l'import des timelines"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Erreur dans la génération du dump du projet"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Erreur au chargement du dump du projet"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -838,6 +872,17 @@ msgid ""
 "---\n"
 "The Taiga Team\n"
 msgstr ""
+"\n"
+"Hey %(user)s,\n"
+"\n"
+"Votre dump a été correctement importé.\n"
+"\n"
+"Vous pouvez voir le(s) %(project)s ici :\n"
+"\n"
+"%(url)s\n"
+"\n"
+"---\n"
+"L'équipe Taiga\n"
 
 #: taiga/export_import/templates/emails/load_dump-subject.jinja:1
 #, python-format
@@ -1290,6 +1335,15 @@ msgstr "Administrer les paramètres du projet"
 msgid "Admin roles"
 msgstr "Administrer les rôles"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "propriétaire"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "arguments manquants"
@@ -1316,13 +1370,15 @@ msgstr "L'utilisateur n'existe pas"
 
 #: taiga/projects/api.py:366
 msgid "The user must be already a project member"
-msgstr ""
+msgstr "L'utilisateur doit déjà être un membre du projet"
 
 #: taiga/projects/api.py:672
 msgid ""
 "The project must have an owner and at least one of the users must be an "
 "active admin"
 msgstr ""
+"Le projet doit avoir un propriétaire et au moins l'un de ses membres doit "
+"être un administrateur actif."
 
 #: taiga/projects/api.py:706
 msgid "You don't have permisions to see that."
@@ -1336,14 +1392,6 @@ msgstr "Mises à jour partielles non supportées"
 msgid "Project ID not matches between object and project"
 msgstr "L'identifiant du projet de correspond pas entre l'objet et le projet"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "propriétaire"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -1415,15 +1463,15 @@ msgstr "Talky"
 
 #: taiga/projects/choices.py:32
 msgid "This project is blocked due to payment failure"
-msgstr ""
+msgstr "Ce projet a été bloqué pour cause d'impayé"
 
 #: taiga/projects/choices.py:33
 msgid "This project is blocked by admin staff"
-msgstr ""
+msgstr "Ce projet a été bloqué par l'équipe administrative"
 
 #: taiga/projects/choices.py:34
 msgid "This project is blocked because the owner left"
-msgstr ""
+msgstr "Ce projet est bloqué car son propriétaire est parti"
 
 #: taiga/projects/custom_attributes/choices.py:27
 msgid "Text"
@@ -1842,7 +1890,7 @@ msgstr "couleurs des tags"
 
 #: taiga/projects/models.py:221
 msgid "project transfer token"
-msgstr ""
+msgstr "jeton de transfert de projet"
 
 #: taiga/projects/models.py:225
 msgid "blocked code"
@@ -2508,6 +2556,8 @@ msgstr "version"
 msgid ""
 "You can't leave the project if you are the owner or there are no more admins"
 msgstr ""
+"Vous ne pouvez pas quitter le projet si vous en êtes le propriétaire ou "
+"qu'il n'y a pas d'autre administrateur."
 
 #: taiga/projects/serializers.py:172
 msgid "Email address is already taken"
@@ -2519,77 +2569,78 @@ msgstr "Rôle non valide pour le projet"
 
 #: taiga/projects/serializers.py:195
 msgid "The project owner must be admin."
-msgstr ""
+msgstr "Le propriétaire du projet doit être un administrateur."
 
 #: taiga/projects/serializers.py:198
 msgid "At least one user must be an active admin for this project."
 msgstr ""
+"Au moins un utilisateur doit être un administrateur actif de ce projet."
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Options par défaut"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Etats de la User Story"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Points"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Etats des tâches"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Statuts des problèmes"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Types de problèmes"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Priorités"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Sévérités"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Rôles"
 
 #: taiga/projects/services/members.py:116
 msgid "You have reached your current limit of memberships for private projects"
-msgstr ""
+msgstr "Vous avez atteint le nombre maximum d'adhésions à des projets privés"
 
 #: taiga/projects/services/members.py:120
 msgid "You have reached your current limit of memberships for public projects"
-msgstr ""
+msgstr "Vous avez atteint le nombre maximum d'adhésions à des projets publics"
 
 #: taiga/projects/services/projects.py:69
 #: taiga/projects/services/projects.py:106 taiga/users/services.py:582
 msgid "You can't have more private projects"
-msgstr ""
+msgstr "Vous avez atteint le nombre maximum de projets privés"
 
 #: taiga/projects/services/projects.py:73
 #: taiga/projects/services/projects.py:110 taiga/users/services.py:585
 msgid ""
 "This project reaches your current limit of memberships for private projects"
-msgstr ""
+msgstr "Ce projet privé est le dernier que vous pouvez rejoindre"
 
 #: taiga/projects/services/projects.py:77
 #: taiga/projects/services/projects.py:114 taiga/users/services.py:589
 msgid "You can't have more public projects"
-msgstr ""
+msgstr "Vous avez atteint le nombre maximum de projets publics."
 
 #: taiga/projects/services/projects.py:81
 #: taiga/projects/services/projects.py:118 taiga/users/services.py:592
 msgid ""
 "This project reaches your current limit of memberships for public projects"
-msgstr ""
+msgstr "Ce projet public est le dernier que vous pouvez rejoindre"
 
 #: taiga/projects/services/stats.py:196
 msgid "Future sprint"
@@ -2608,7 +2659,7 @@ msgstr "Jeton invalide"
 
 #: taiga/projects/services/transfer.py:66
 msgid "Token has expired"
-msgstr ""
+msgstr "Le jeton est périmé"
 
 #: taiga/projects/tasks/api.py:113 taiga/projects/tasks/api.py:122
 msgid "You don't have permissions to set this sprint to this task."
@@ -2653,6 +2704,11 @@ msgid ""
 "Management Tool.</p>\n"
 "    "
 msgstr ""
+"\n"
+"<h2>Vous avez été invité à Taiga !</h2>\n"
+"<p>Hey ! %(full_name)s vous a invité à rejoindre le projet <em>%(project)s</"
+"em>.</br> Taiga est un outil de gestion de projet Agile libre et open source."
+"</p>"
 
 #: taiga/projects/templates/emails/membership_invitation-body-html.jinja:17
 #, python-format
@@ -2784,7 +2840,7 @@ msgstr ""
 #: taiga/projects/templates/emails/transfer_accept-body-html.jinja:10
 #, python-format
 msgid "<p>%(new_owner_name)s says:</p>"
-msgstr ""
+msgstr "<p>%(new_owner_name)s a dit :</p>"
 
 #: taiga/projects/templates/emails/transfer_accept-body-html.jinja:14
 msgid ""
@@ -2793,6 +2849,10 @@ msgid ""
 "p>\n"
 "    "
 msgstr ""
+"\n"
+"<p>À partir de maintenant, votre nouveau status pour ce projet sera celui "
+"d'Administrateur.</p>\n"
+"    "
 
 #: taiga/projects/templates/emails/transfer_accept-body-text.jinja:1
 #, python-format
@@ -2813,6 +2873,9 @@ msgid ""
 "\n"
 "From now on, your new status for this project will be \"admin\".\n"
 msgstr ""
+"\n"
+"À partir de maintenant, votre nouveau status pour ce projet sera celui "
+"d'Administrateur.\n"
 
 #: taiga/projects/templates/emails/transfer_accept-body-text.jinja:16
 #: taiga/projects/templates/emails/transfer_reject-body-text.jinja:19
@@ -2822,6 +2885,8 @@ msgid ""
 "\n"
 "The Taiga Team\n"
 msgstr ""
+"\n"
+"L'Équipe Taiga\n"
 
 #: taiga/projects/templates/emails/transfer_accept-subject.jinja:1
 #, python-format
@@ -2847,6 +2912,8 @@ msgid ""
 "    <p>%(rejecter_name)s says:</p>\n"
 "    "
 msgstr ""
+"\n"
+"    <p>%(rejecter_name)s a dit :</p>"
 
 #: taiga/projects/templates/emails/transfer_reject-body-html.jinja:16
 msgid ""
@@ -2855,6 +2922,10 @@ msgid ""
 "different person.</p>\n"
 "    "
 msgstr ""
+"\n"
+"    <p>Vous pouvez toujours, si vous le désirez, essayer de transférer la "
+"propriété du projet à quelqu'un d'autre.</p>\n"
+"    "
 
 #: taiga/projects/templates/emails/transfer_reject-body-html.jinja:21
 #: taiga/projects/templates/emails/transfer_reject-body-html.jinja:22
@@ -2914,7 +2985,7 @@ msgstr ""
 #: taiga/projects/templates/emails/transfer_request-body-html.jinja:14
 #: taiga/projects/templates/emails/transfer_start-body-html.jinja:22
 msgid "Continue"
-msgstr ""
+msgstr "Continuer"
 
 #: taiga/projects/templates/emails/transfer_request-body-text.jinja:1
 #, python-format
@@ -2960,6 +3031,8 @@ msgid ""
 "        <p>%(owner_name)s says:</p>\n"
 "        "
 msgstr ""
+"\n"
+"        <p>%(owner_name)s a dit:</p>"
 
 #: taiga/projects/templates/emails/transfer_start-body-html.jinja:17
 msgid ""
@@ -3344,7 +3417,7 @@ msgstr ""
 
 #: taiga/users/admin.py:49
 msgid "id"
-msgstr ""
+msgstr "id"
 
 #: taiga/users/admin.py:81
 msgid "Project Ownership"
@@ -3364,7 +3437,7 @@ msgstr "Permissions"
 
 #: taiga/users/admin.py:123
 msgid "Restrictions"
-msgstr ""
+msgstr "Restrictions"
 
 #: taiga/users/admin.py:125
 msgid "Important dates"
@@ -3674,7 +3747,7 @@ msgstr ""
 "\n"
 "Merci pour votre inscription sur Taiga\n"
 "\n"
-"Nous espérons que vous l'appréciez\n"
+"Nous espérons que vous l'apprécierez\n"
 "\n"
 "Nous avons construit Taiga car nous voulions que l'outil de gestion de "
 "projet que nous utilisons au quotidien, nous rappelle en permanence pourquoi "
diff --git a/taiga/locale/it/LC_MESSAGES/django.po b/taiga/locale/it/LC_MESSAGES/django.po
index c1f4fcd6..8090f674 100644
--- a/taiga/locale/it/LC_MESSAGES/django.po
+++ b/taiga/locale/it/LC_MESSAGES/django.po
@@ -15,8 +15,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Italian (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/it/)\n"
@@ -201,7 +201,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -365,7 +365,7 @@ msgid "Error in filter params types."
 msgstr "Errore nel filtro del tipo di parametri."
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'Progetto' deve essere un valore intero."
 
@@ -531,63 +531,6 @@ msgstr "E' richiesto un file di dump"
 msgid "Invalid dump format"
 msgstr "Formato di dump invalido"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "Errore nell'importazione del progetto dati"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "Errore nell'importazione della lista degli attributi di progetto"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr ""
-"Errore nell'importazione dei valori predefiniti degli attributi del progetto."
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "Errore nell'importazione degli attributi personalizzati"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "Errore nell'importazione i ruoli"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "Errore nell'importazione delle iscrizioni"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "errore nell'importazione degli sprints"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "Errore nell'importazione delle pagine wiki"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "Errore nell'importazione dei link di wiki"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "errore nell'importazione dei problemi"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "Errore nell'importazione delle user story"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "Errore nell'importazione dei compiti "
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "Errore nell'importazione dei tags"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "Errore nell'importazione delle timelines"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" non è stato trovato in questo progetto"
@@ -607,14 +550,104 @@ msgstr "Contiene campi personalizzati invalidi."
 msgid "Name duplicated for the project"
 msgstr "Il nome del progetto è duplicato"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "Errore nell'importazione del progetto dati"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "Errore nell'importazione i ruoli"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "Errore nell'importazione delle iscrizioni"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "Errore nell'importazione della lista degli attributi di progetto"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr ""
+"Errore nell'importazione dei valori predefiniti degli attributi del progetto."
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "Errore nell'importazione degli attributi personalizzati"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "errore nell'importazione degli sprints"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "Errore nell'importazione delle user story"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "Errore nell'importazione dei compiti "
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "errore nell'importazione dei problemi"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "Errore nell'importazione delle pagine wiki"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "Errore nell'importazione dei link di wiki"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "Errore nell'importazione dei tags"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "Errore nell'importazione delle timelines"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Errore nella creazione del dump di progetto"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Errore nel caricamento del dump di progetto"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1413,6 +1446,15 @@ msgstr "Valori dell'amministratore del progetto"
 msgid "Admin roles"
 msgstr "Ruoli dell'amministratore"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "proprietario"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Argomento non valido"
@@ -1459,14 +1501,6 @@ msgstr "Aggiornamento non parziale non supportato"
 msgid "Project ID not matches between object and project"
 msgstr "L'ID di progetto non corrisponde tra oggetto e progetto"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "proprietario"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -3005,39 +3039,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Opzioni predefinite"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Stati della storia utente"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Punti"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Stati del compito"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Stati del problema"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Tipologie del problema"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Priorità"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Criticità"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Ruoli"
 
diff --git a/taiga/locale/nl/LC_MESSAGES/django.po b/taiga/locale/nl/LC_MESSAGES/django.po
index d1782718..e0d6070d 100644
--- a/taiga/locale/nl/LC_MESSAGES/django.po
+++ b/taiga/locale/nl/LC_MESSAGES/django.po
@@ -9,8 +9,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Dutch (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/nl/)\n"
@@ -199,7 +199,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -361,7 +361,7 @@ msgid "Error in filter params types."
 msgstr "Fout in filter params types."
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'project' moet een integer waarde zijn."
 
@@ -518,62 +518,6 @@ msgstr "Dump file nodig"
 msgid "Invalid dump format"
 msgstr "Ongeldig dump formaat"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "fout bij het importeren van project data"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "fout bij importeren van project attributenlijst"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr "fout bij importeren van standaard projectattributen waarden"
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "fout bij importeren eigen attributen"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "fout bij importeren rollen"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "fout bij importeren lidmaatschappen"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "fout bij importeren sprints"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "fout bij importeren wiki pagina's"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "fout bij importeren wiki links"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "fout bij importeren issues"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "fout bij importeren user stories"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "fout bij importeren taken"
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "fout bij importeren tags"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "fout bij importeren tijdlijnen"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" niet gevonden in dit project"
@@ -593,14 +537,103 @@ msgstr "Het bevat ongeldige eigen velden:"
 msgid "Name duplicated for the project"
 msgstr "Naam gedupliceerd voor het project"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "fout bij het importeren van project data"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "fout bij importeren rollen"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "fout bij importeren lidmaatschappen"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "fout bij importeren van project attributenlijst"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr "fout bij importeren van standaard projectattributen waarden"
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "fout bij importeren eigen attributen"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "fout bij importeren sprints"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "fout bij importeren user stories"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "fout bij importeren taken"
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "fout bij importeren issues"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "fout bij importeren wiki pagina's"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "fout bij importeren wiki links"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "fout bij importeren tags"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "fout bij importeren tijdlijnen"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Fout bij genereren project dump"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Fout bij laden project dump"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1211,6 +1244,15 @@ msgstr "Admin project waarden"
 msgid "Admin roles"
 msgstr "Admin rollen"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "eigenaar"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Onvolledige argumenten"
@@ -1257,14 +1299,6 @@ msgstr ""
 msgid "Project ID not matches between object and project"
 msgstr "Project ID van object is niet gelijk aan die van het project"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "eigenaar"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2448,39 +2482,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Standaard opties"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Status van User story"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Punten"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Statussen van taken"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Statussen van Issues"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Types van issue"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Prioriteiten"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Ernstniveaus"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Rollen"
 
diff --git a/taiga/locale/pl/LC_MESSAGES/django.po b/taiga/locale/pl/LC_MESSAGES/django.po
index 5ba1251c..f7ce189e 100644
--- a/taiga/locale/pl/LC_MESSAGES/django.po
+++ b/taiga/locale/pl/LC_MESSAGES/django.po
@@ -10,8 +10,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Polish (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/pl/)\n"
@@ -193,7 +193,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -356,7 +356,7 @@ msgid "Error in filter params types."
 msgstr "Błąd w parametrach typów filtrów."
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'project' musi być wartością typu int."
 
@@ -519,62 +519,6 @@ msgstr "Wymagany plik zrzutu"
 msgid "Invalid dump format"
 msgstr "Nieprawidłowy format zrzutu"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "błąd w trakcie importu danych projektu"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "błąd w trakcie importu atrybutów projektu"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr "błąd w trakcie importu domyślnych atrybutów projektu"
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "błąd w trakcie importu niestandardowych atrybutów"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "błąd w trakcie importu ról"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "błąd w trakcie importu członkostw"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "błąd w trakcie importu sprintów"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "błąd w trakcie importu stron Wiki"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "błąd w trakcie importu linków Wiki"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "błąd w trakcie importu zgłoszeń"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "błąd w trakcie importu historyjek użytkownika"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "błąd w trakcie importu zadań"
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "błąd w trakcie importu tagów"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "błąd w trakcie importu osi czasu"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" nie odnaleziono w projekcie"
@@ -594,14 +538,103 @@ msgstr "Zawiera niewłaściwe pola niestandardowe."
 msgid "Name duplicated for the project"
 msgstr "Nazwa projektu zduplikowana"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "błąd w trakcie importu danych projektu"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "błąd w trakcie importu ról"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "błąd w trakcie importu członkostw"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "błąd w trakcie importu atrybutów projektu"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr "błąd w trakcie importu domyślnych atrybutów projektu"
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "błąd w trakcie importu niestandardowych atrybutów"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "błąd w trakcie importu sprintów"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "błąd w trakcie importu historyjek użytkownika"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "błąd w trakcie importu zadań"
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "błąd w trakcie importu zgłoszeń"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "błąd w trakcie importu stron Wiki"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "błąd w trakcie importu linków Wiki"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "błąd w trakcie importu tagów"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "błąd w trakcie importu osi czasu"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Błąd w trakcie generowania zrzutu projektu"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Błąd w trakcie wczytywania zrzutu projektu"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1319,6 +1352,15 @@ msgstr "Administruj wartościami projektu"
 msgid "Admin roles"
 msgstr "Administruj rolami"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "właściciel"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Pola niekompletne"
@@ -1365,14 +1407,6 @@ msgstr ""
 msgid "Project ID not matches between object and project"
 msgstr "ID nie pasuje pomiędzy obiektem a projektem"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "właściciel"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2785,39 +2819,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Domyślne opcje"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Statusy historyjek użytkownika"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Punkty"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Statusy zadań"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Statusy zgłoszeń"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Typu zgłoszeń"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Priorytety"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Ważność"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Role"
 
diff --git a/taiga/locale/pt_BR/LC_MESSAGES/django.po b/taiga/locale/pt_BR/LC_MESSAGES/django.po
index 9b3d2b72..2e440979 100644
--- a/taiga/locale/pt_BR/LC_MESSAGES/django.po
+++ b/taiga/locale/pt_BR/LC_MESSAGES/django.po
@@ -19,8 +19,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Portuguese (Brazil) (http://www.transifex.com/taiga-agile-llc/"
 "taiga-back/language/pt_BR/)\n"
@@ -200,7 +200,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -363,7 +363,7 @@ msgid "Error in filter params types."
 msgstr "Erro nos tipos de parâmetros do filtro."
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'projeto' deve ser um valor inteiro."
 
@@ -527,62 +527,6 @@ msgstr "Necessário de arquivo de restauração"
 msgid "Invalid dump format"
 msgstr "Formato de aquivo de restauração inválido"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "erro ao importar informações de projeto"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "erro importando lista de atributos do projeto"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr "erro importando valores de atributos do projeto padrão"
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "erro importando atributos personalizados"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "erro importando funcões"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "erro importando filiações"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "erro importando sprints"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "erro importando páginas wiki"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "erro importando wiki links"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "erro importando casos"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "erro importando user stories"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "erro importando tarefas"
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "erro importando tags"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "erro importando linha do tempo"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" não encontrado nesse projeto"
@@ -602,14 +546,103 @@ msgstr "Contém campos personalizados inválidos"
 msgid "Name duplicated for the project"
 msgstr "Nome duplicado para o projeto"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "erro ao importar informações de projeto"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "erro importando funcões"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "erro importando filiações"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "erro importando lista de atributos do projeto"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr "erro importando valores de atributos do projeto padrão"
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "erro importando atributos personalizados"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "erro importando sprints"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "erro importando user stories"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "erro importando tarefas"
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "erro importando casos"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "erro importando páginas wiki"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "erro importando wiki links"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "erro importando tags"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "erro importando linha do tempo"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Erro gerando arquivo de restauração do projeto"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Erro carregando arquivo de restauração do projeto"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1325,6 +1358,15 @@ msgstr "Valores projeto admin"
 msgid "Admin roles"
 msgstr "Funções Admin"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "dono"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Argumentos incompletos"
@@ -1371,14 +1413,6 @@ msgstr "Atualizações parciais não são suportadas"
 msgid "Project ID not matches between object and project"
 msgstr "ID do projeto não combina entre objeto e projeto"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "dono"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2769,39 +2803,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Opções padrão"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Status de user story"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Pontos"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Status de tarefas"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Status de casos"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Tipos de casos"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Prioridades"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Severidades"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Funções"
 
diff --git a/taiga/locale/ru/LC_MESSAGES/django.po b/taiga/locale/ru/LC_MESSAGES/django.po
index f9c67e5f..366ee566 100644
--- a/taiga/locale/ru/LC_MESSAGES/django.po
+++ b/taiga/locale/ru/LC_MESSAGES/django.po
@@ -15,8 +15,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Russian (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/ru/)\n"
@@ -203,7 +203,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -365,7 +365,7 @@ msgid "Error in filter params types."
 msgstr "Ошибка в типах фильтров для параметров."
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'project' должно быть целым значением."
 
@@ -529,62 +529,6 @@ msgstr "Необходим дамп-файл"
 msgid "Invalid dump format"
 msgstr "Неправильный формат дампа"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "ошибка при импорте данных проекта"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "ошибка при импорте списков свойств проекта"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr "ошибка при импорте значений по умолчанию свойств проекта"
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "ошибка при импорте пользовательских свойств"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "ошибка при импорте ролей"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "ошибка при импорте членства"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "ошибка при импорте спринтов"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "ошибка при импорте вики-страниц"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "ошибка при импорте вики-ссылок"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "ошибка при импорте запросов"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "ошибка импорта историй от пользователей"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "ошибка импорта задач"
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "ошибка импорта тэгов"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "ошибка импорта хронологии проекта"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" не найдено в этом проекте"
@@ -604,14 +548,103 @@ msgstr "Содержит неверные специальные поля"
 msgid "Name duplicated for the project"
 msgstr "Уже есть такое имя для проекта"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "ошибка при импорте данных проекта"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "ошибка при импорте ролей"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "ошибка при импорте членства"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "ошибка при импорте списков свойств проекта"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr "ошибка при импорте значений по умолчанию свойств проекта"
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "ошибка при импорте пользовательских свойств"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "ошибка при импорте спринтов"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "ошибка импорта историй от пользователей"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "ошибка импорта задач"
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "ошибка при импорте запросов"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "ошибка при импорте вики-страниц"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "ошибка при импорте вики-ссылок"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "ошибка импорта тэгов"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "ошибка импорта хронологии проекта"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Ошибка создания свалочного файла для проекта"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Ошибка загрузки свалочного файла проекта"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1326,6 +1359,15 @@ msgstr "Управлять значениями проекта"
 msgid "Admin roles"
 msgstr "Управлять ролями"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "владелец"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Список аргументов неполон"
@@ -1372,14 +1414,6 @@ msgstr "Частичные обновления не поддерживаютс
 msgid "Project ID not matches between object and project"
 msgstr "Идентификатор проекта не подходит к этому объекту"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "владелец"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2784,39 +2818,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Параметры по умолчанию"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Статусу пользовательских историй"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Очки"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Статусы задачи"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Статусы запроса"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Типы запроса"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Приоритеты"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Степени важности"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Роли"
 
diff --git a/taiga/locale/sv/LC_MESSAGES/django.po b/taiga/locale/sv/LC_MESSAGES/django.po
index 88143ba9..705d5cc6 100644
--- a/taiga/locale/sv/LC_MESSAGES/django.po
+++ b/taiga/locale/sv/LC_MESSAGES/django.po
@@ -8,8 +8,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Swedish (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/sv/)\n"
@@ -192,7 +192,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -355,7 +355,7 @@ msgid "Error in filter params types."
 msgstr "Fel i filterparametertyper."
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'Projektet\" måste vara ett heltal."
 
@@ -503,62 +503,6 @@ msgstr "Behöver en hämtningsfil"
 msgid "Invalid dump format"
 msgstr "Invalid hämtningsfilformat"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "fel vid import av projektdata"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "fel vid import av en lista på projektegenskaper"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr "fel vid import av standard projektegenskapsvärden"
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "fel vid import av anpassade egenskaper"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "fel vid importering av roller"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "fel vid import av medlemskap"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "felaktig import av sprintar"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "vel vid import av wiki-sidor"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "fel vid import av wiki-länkar"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "fel vid import av ärenden"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "fel vid import av användarhistorier"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "fel vid import av uppgifter"
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "fel vid importering av taggar"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "fel vid importering av tidslinje"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" gick inte att hitta för det här projektet"
@@ -578,14 +522,103 @@ msgstr "Innehåller felaktigt anpassad fält."
 msgid "Name duplicated for the project"
 msgstr "Namnet är upprepad för projektet"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "fel vid import av projektdata"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "fel vid importering av roller"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "fel vid import av medlemskap"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "fel vid import av en lista på projektegenskaper"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr "fel vid import av standard projektegenskapsvärden"
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "fel vid import av anpassade egenskaper"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "felaktig import av sprintar"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "fel vid import av användarhistorier"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "fel vid import av uppgifter"
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "fel vid import av ärenden"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "vel vid import av wiki-sidor"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "fel vid import av wiki-länkar"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "fel vid importering av taggar"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "fel vid importering av tidslinje"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Fel vid skapandet av projektkopia"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Feil vid hämtning av projektkopia"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1166,6 +1199,15 @@ msgstr "Administrera projektvärden"
 msgid "Admin roles"
 msgstr "Administratorroller"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "ägare"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Felaktiga argument"
@@ -1212,14 +1254,6 @@ msgstr "Delvisa uppdateringar stöds inte. "
 msgid "Project ID not matches between object and project"
 msgstr "Projekt-ID stämmer inte mellan objekt och projekt"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "ägare"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2371,39 +2405,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Standardval"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Status för användarhistorien"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Poäng"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Status för uppgifter"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Status för ärenden"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Ärendetyper"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Prioritet"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Allvarsgrad"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Roller"
 
diff --git a/taiga/locale/tr/LC_MESSAGES/django.po b/taiga/locale/tr/LC_MESSAGES/django.po
index 59c3af70..15ea255e 100644
--- a/taiga/locale/tr/LC_MESSAGES/django.po
+++ b/taiga/locale/tr/LC_MESSAGES/django.po
@@ -10,8 +10,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Turkish (http://www.transifex.com/taiga-agile-llc/taiga-back/"
 "language/tr/)\n"
@@ -200,7 +200,7 @@ msgstr ""
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr "Engellenmiş nesne"
 
@@ -361,7 +361,7 @@ msgid "Error in filter params types."
 msgstr "Parametre tipleri filtresinde hata."
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "'project' değeri numerik olmalı."
 
@@ -513,62 +513,6 @@ msgstr "İhtiyaç duyulan döküm dosyası"
 msgid "Invalid dump format"
 msgstr "Geçersiz döküm biçemi"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "İçeri aktarılan proje verisinde hata"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "proje öznitelikleri listesi içeriye aktarılırken hata oluştu"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr "varsayılan proje öznitelikleri değerlerinin içeriye aktarımında hata"
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "özel öznitelikler içeri aktarılırken hata"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "İçeri aktarılan rollerde hata"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "İçeri aktarılan üyeliklerde hata"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "İçeri aktarılan sprintlerde hata"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "İçeri aktarılan wiki sayfalarında hata"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "İçeri aktarılan wiki bağlantılarında hata"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "İçeri aktarılan taleplerde hata"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "İçeri aktarılan kullanıcı hikayelerinde hata"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "İçeri aktarılan görevlerde hata"
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "İçeri aktarılan etiketlerde hata"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "zaman çizelgesi içeri aktarılırken hata"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" bu projede bulunamadı"
@@ -588,14 +532,103 @@ msgstr "Geçersiz özel alanlar içeriyor."
 msgid "Name duplicated for the project"
 msgstr "Aynı isimde proje bulunmakta"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "İçeri aktarılan proje verisinde hata"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "İçeri aktarılan rollerde hata"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "İçeri aktarılan üyeliklerde hata"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "proje öznitelikleri listesi içeriye aktarılırken hata oluştu"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr "varsayılan proje öznitelikleri değerlerinin içeriye aktarımında hata"
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "özel öznitelikler içeri aktarılırken hata"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "İçeri aktarılan sprintlerde hata"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "İçeri aktarılan kullanıcı hikayelerinde hata"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "İçeri aktarılan görevlerde hata"
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "İçeri aktarılan taleplerde hata"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "İçeri aktarılan wiki sayfalarında hata"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "İçeri aktarılan wiki bağlantılarında hata"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "İçeri aktarılan etiketlerde hata"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "zaman çizelgesi içeri aktarılırken hata"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "Proje dökümü oluşturulurken hata"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "Proje dökümü yükleniyorken hata"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1273,6 +1306,15 @@ msgstr "Admin proje değerleri"
 msgid "Admin roles"
 msgstr "Yönetici rolleri"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "sahip"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "Eksik parametreq"
@@ -1319,14 +1361,6 @@ msgstr "Kısmi güncellemeler desteklenmiyor"
 msgid "Project ID not matches between object and project"
 msgstr "Proje ve nesne arasında Proje ID uyuşmazlığı mevcut"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "sahip"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2544,39 +2578,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "Varsayılan ayarlar"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "Kullanıcı hikayelerinin durumları"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "Puanlar"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "Görevlerin durumları"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "Taleplerin durumları"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "Taleplerin tipleri"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "Öncelikler"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "Önem dereceleri"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "Roller"
 
diff --git a/taiga/locale/zh-Hant/LC_MESSAGES/django.po b/taiga/locale/zh-Hant/LC_MESSAGES/django.po
index d357abfa..5537e07f 100644
--- a/taiga/locale/zh-Hant/LC_MESSAGES/django.po
+++ b/taiga/locale/zh-Hant/LC_MESSAGES/django.po
@@ -11,8 +11,8 @@ msgid ""
 msgstr ""
 "Project-Id-Version: taiga-back\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2016-04-19 16:00+0200\n"
-"PO-Revision-Date: 2016-04-19 14:00+0000\n"
+"POT-Creation-Date: 2016-05-01 19:09+0200\n"
+"PO-Revision-Date: 2016-05-01 17:09+0000\n"
 "Last-Translator: Taiga Dev Team <support@taiga.io>\n"
 "Language-Team: Chinese Traditional (http://www.transifex.com/taiga-agile-llc/"
 "taiga-back/language/zh-Hant/)\n"
@@ -186,7 +186,7 @@ msgstr "上傳有效圖片，你所上傳的檔案非圖檔或已損壞"
 #: taiga/projects/issues/api.py:233 taiga/projects/mixins/ordering.py:58
 #: taiga/projects/tasks/api.py:152 taiga/projects/tasks/api.py:174
 #: taiga/projects/userstories/api.py:218 taiga/projects/userstories/api.py:238
-#: taiga/webhooks/api.py:67
+#: taiga/webhooks/api.py:68
 msgid "Blocked element"
 msgstr ""
 
@@ -347,7 +347,7 @@ msgid "Error in filter params types."
 msgstr "過濾參數類型出錯"
 
 #: taiga/base/filters.py:133 taiga/base/filters.py:232
-#: taiga/projects/filters.py:59
+#: taiga/projects/filters.py:63
 msgid "'project' must be an integer value."
 msgstr "專案須為整數值"
 
@@ -510,62 +510,6 @@ msgstr "需要的堆存檔案"
 msgid "Invalid dump format"
 msgstr "無效堆存格式"
 
-#: taiga/export_import/dump_service.py:112
-msgid "error importing project data"
-msgstr "滙入重要專案資料出錯"
-
-#: taiga/export_import/dump_service.py:125
-msgid "error importing lists of project attributes"
-msgstr "滙入標籤出錯"
-
-#: taiga/export_import/dump_service.py:130
-msgid "error importing default project attributes values"
-msgstr "滙入預設專案屬性數值出錯"
-
-#: taiga/export_import/dump_service.py:140
-msgid "error importing custom attributes"
-msgstr "滙入客制性屬出錯"
-
-#: taiga/export_import/dump_service.py:145
-msgid "error importing roles"
-msgstr "滙入角色出錯"
-
-#: taiga/export_import/dump_service.py:160
-msgid "error importing memberships"
-msgstr "滙入成員資格出錯"
-
-#: taiga/export_import/dump_service.py:165
-msgid "error importing sprints"
-msgstr "滙入衝刺任務出錯"
-
-#: taiga/export_import/dump_service.py:170
-msgid "error importing wiki pages"
-msgstr "滙入維基頁出錯"
-
-#: taiga/export_import/dump_service.py:175
-msgid "error importing wiki links"
-msgstr "滙入維基連結出錯"
-
-#: taiga/export_import/dump_service.py:180
-msgid "error importing issues"
-msgstr "滙入問題出錯"
-
-#: taiga/export_import/dump_service.py:185
-msgid "error importing user stories"
-msgstr "滙入使用者故事出錯"
-
-#: taiga/export_import/dump_service.py:190
-msgid "error importing tasks"
-msgstr "滙入任務出錯"
-
-#: taiga/export_import/dump_service.py:195
-msgid "error importing tags"
-msgstr "滙入標籤出錯"
-
-#: taiga/export_import/dump_service.py:199
-msgid "error importing timelines"
-msgstr "滙入時間軸出錯"
-
 #: taiga/export_import/serializers.py:178
 msgid "{}=\"{}\" not found in this project"
 msgstr "{}=\"{}\" 無法在此專案中找到"
@@ -585,14 +529,103 @@ msgstr "包括無效慣例欄位"
 msgid "Name duplicated for the project"
 msgstr "專案的名稱被複製了"
 
-#: taiga/export_import/tasks.py:55 taiga/export_import/tasks.py:56
+#: taiga/export_import/services/store.py:621
+#: taiga/export_import/services/store.py:639
+msgid "error importing project data"
+msgstr "滙入重要專案資料出錯"
+
+#: taiga/export_import/services/store.py:646
+msgid "error importing roles"
+msgstr "滙入角色出錯"
+
+#: taiga/export_import/services/store.py:651
+msgid "error importing memberships"
+msgstr "滙入成員資格出錯"
+
+#: taiga/export_import/services/store.py:661
+msgid "error importing lists of project attributes"
+msgstr "滙入標籤出錯"
+
+#: taiga/export_import/services/store.py:665
+msgid "error importing default project attributes values"
+msgstr "滙入預設專案屬性數值出錯"
+
+#: taiga/export_import/services/store.py:674
+msgid "error importing custom attributes"
+msgstr "滙入客制性屬出錯"
+
+#: taiga/export_import/services/store.py:679
+msgid "error importing sprints"
+msgstr "滙入衝刺任務出錯"
+
+#: taiga/export_import/services/store.py:683
+msgid "error importing user stories"
+msgstr "滙入使用者故事出錯"
+
+#: taiga/export_import/services/store.py:687
+msgid "error importing tasks"
+msgstr "滙入任務出錯"
+
+#: taiga/export_import/services/store.py:691
+msgid "error importing issues"
+msgstr "滙入問題出錯"
+
+#: taiga/export_import/services/store.py:695
+msgid "error importing wiki pages"
+msgstr "滙入維基頁出錯"
+
+#: taiga/export_import/services/store.py:699
+msgid "error importing wiki links"
+msgstr "滙入維基連結出錯"
+
+#: taiga/export_import/services/store.py:703
+msgid "error importing tags"
+msgstr "滙入標籤出錯"
+
+#: taiga/export_import/services/store.py:707
+msgid "error importing timelines"
+msgstr "滙入時間軸出錯"
+
+#: taiga/export_import/services/store.py:731
+msgid "unexpected error importing project"
+msgstr ""
+
+#: taiga/export_import/tasks.py:56 taiga/export_import/tasks.py:57
 msgid "Error generating project dump"
 msgstr "產生專案傾倒時出錯"
 
-#: taiga/export_import/tasks.py:88 taiga/export_import/tasks.py:89
+#: taiga/export_import/tasks.py:81
+#, python-brace-format
+msgid ""
+"\n"
+"\n"
+"Error loading dump by {user_full_name} <{user_email}>:\"\n"
+"\n"
+"\n"
+"REASON:\n"
+"-------\n"
+"{reason}\n"
+"\n"
+"DETAILS:\n"
+"--------\n"
+"{details}\n"
+"\n"
+"TRACE ERROR:\n"
+"------------"
+msgstr ""
+
+#: taiga/export_import/tasks.py:110
 msgid "Error loading project dump"
 msgstr "載入專案傾倒時出錯"
 
+#: taiga/export_import/tasks.py:111
+msgid "Error loading your project dump file"
+msgstr ""
+
+#: taiga/export_import/tasks.py:125
+msgid "  -- no detail info --"
+msgstr ""
+
 #: taiga/export_import/templates/emails/dump_project-body-html.jinja:4
 #, python-format
 msgid ""
@@ -1299,6 +1332,15 @@ msgstr "管理員專案數值"
 msgid "Admin roles"
 msgstr "管理員角色"
 
+#: taiga/projects/admin.py:90 taiga/projects/attachments/models.py:38
+#: taiga/projects/issues/models.py:39 taiga/projects/milestones/models.py:43
+#: taiga/projects/models.py:162 taiga/projects/notifications/models.py:61
+#: taiga/projects/tasks/models.py:38 taiga/projects/userstories/models.py:66
+#: taiga/projects/wiki/models.py:36 taiga/users/admin.py:69
+#: taiga/userstorage/models.py:26
+msgid "owner"
+msgstr "所有者"
+
 #: taiga/projects/api.py:165 taiga/users/api.py:220
 msgid "Incomplete arguments"
 msgstr "不完整參數"
@@ -1345,14 +1387,6 @@ msgstr "不支援部份更新"
 msgid "Project ID not matches between object and project"
 msgstr "專案ID不符合物件與專案"
 
-#: taiga/projects/attachments/models.py:38 taiga/projects/issues/models.py:39
-#: taiga/projects/milestones/models.py:43 taiga/projects/models.py:162
-#: taiga/projects/notifications/models.py:61 taiga/projects/tasks/models.py:38
-#: taiga/projects/userstories/models.py:66 taiga/projects/wiki/models.py:36
-#: taiga/users/admin.py:69 taiga/userstorage/models.py:26
-msgid "owner"
-msgstr "所有者"
-
 #: taiga/projects/attachments/models.py:40
 #: taiga/projects/custom_attributes/models.py:42
 #: taiga/projects/issues/models.py:52 taiga/projects/milestones/models.py:45
@@ -2754,39 +2788,39 @@ msgstr ""
 msgid "At least one user must be an active admin for this project."
 msgstr ""
 
-#: taiga/projects/serializers.py:392
+#: taiga/projects/serializers.py:396
 msgid "Default options"
 msgstr "預設選項"
 
-#: taiga/projects/serializers.py:393
+#: taiga/projects/serializers.py:397
 msgid "User story's statuses"
 msgstr "使用者故事狀態"
 
-#: taiga/projects/serializers.py:394
+#: taiga/projects/serializers.py:398
 msgid "Points"
 msgstr "點數"
 
-#: taiga/projects/serializers.py:395
+#: taiga/projects/serializers.py:399
 msgid "Task's statuses"
 msgstr "任務狀態"
 
-#: taiga/projects/serializers.py:396
+#: taiga/projects/serializers.py:400
 msgid "Issue's statuses"
 msgstr "問題狀態"
 
-#: taiga/projects/serializers.py:397
+#: taiga/projects/serializers.py:401
 msgid "Issue's types"
 msgstr "問題類型"
 
-#: taiga/projects/serializers.py:398
+#: taiga/projects/serializers.py:402
 msgid "Priorities"
 msgstr "優先性"
 
-#: taiga/projects/serializers.py:399
+#: taiga/projects/serializers.py:403
 msgid "Severities"
 msgstr "嚴重性"
 
-#: taiga/projects/serializers.py:400
+#: taiga/projects/serializers.py:404
 msgid "Roles"
 msgstr "角色"