diff --git a/openerp/osv/orm.py b/openerp/osv/orm.py
index 809ac01a077..8a432240567 100644
--- a/openerp/osv/orm.py
+++ b/openerp/osv/orm.py
@@ -1362,11 +1362,9 @@ class BaseModel(object):
                      noupdate=noupdate, res_id=id, context=context))
                 cr.execute('RELEASE SAVEPOINT model_load_save')
             except psycopg2.Warning, e:
-                _logger.exception('Failed to import record %s', record)
                 messages.append(dict(info, type='warning', message=str(e)))
                 cr.execute('ROLLBACK TO SAVEPOINT model_load_save')
             except psycopg2.Error, e:
-                _logger.exception('Failed to import record %s', record)
                 messages.append(dict(
                     info, type='error',
                     **PGERROR_TO_OE[e.pgcode](self, fg, info, e)))
@@ -5327,11 +5325,28 @@ def convert_pgerror_23502(model, fields, info, e):
         'message': message,
         'field': field_name,
     }
+def convert_pgerror_23505(model, fields, info, e):
+    m = re.match(r'^duplicate key (?P<field>\w+) violates unique constraint',
+                 str(e))
+    field_name = m.group('field')
+    if not m or field_name not in fields:
+        return {'message': unicode(e)}
+    message = _(u"The value for the field '%s' already exists.") % field_name
+    field = fields.get(field_name)
+    if field:
+        message = _(u"%s This might be '%s' in the current model, or a field "
+                    u"of the same name in an o2m.") % (message, field['string'])
+    return {
+        'message': message,
+        'field': field_name,
+    }
 
 PGERROR_TO_OE = collections.defaultdict(
     # shape of mapped converters
     lambda: (lambda model, fvg, info, pgerror: {'message': unicode(pgerror)}), {
     # not_null_violation
     '23502': convert_pgerror_23502,
+    # unique constraint error
+    '23505': convert_pgerror_23505,
 })
 # vim:expandtab:smartindent:tabstop=4:softtabstop=4:shiftwidth=4:
diff --git a/openerp/tests/addons/test_impex/ir.model.access.csv b/openerp/tests/addons/test_impex/ir.model.access.csv
index 9a674d9ee1f..fd0f7370c67 100644
--- a/openerp/tests/addons/test_impex/ir.model.access.csv
+++ b/openerp/tests/addons/test_impex/ir.model.access.csv
@@ -23,3 +23,4 @@ access_export_one2many_child_2,access_export_one2many_child_2,model_export_one2m
 access_export_many2many_other,access_export_many2many_other,model_export_many2many_other,,1,1,1,1
 access_export_selection_withdefault,access_export_selection_withdefault,model_export_selection_withdefault,,1,1,1,1
 access_export_one2many_recursive,access_export_one2many_recursive,model_export_one2many_recursive,,1,1,1,1
+access_export_unique,access_export_unique,model_export_unique,,1,1,1,1
diff --git a/openerp/tests/addons/test_impex/models.py b/openerp/tests/addons/test_impex/models.py
index 95a7f90bda8..8c76850d628 100644
--- a/openerp/tests/addons/test_impex/models.py
+++ b/openerp/tests/addons/test_impex/models.py
@@ -144,3 +144,13 @@ class RecO2M(orm.Model):
         'value': fields.integer(),
         'child': fields.one2many('export.one2many.multiple', 'parent_id')
     }
+
+class OnlyOne(orm.Model):
+    _name = 'export.unique'
+
+    _columns = {
+        'value': fields.integer(),
+    }
+    _sql_constraints = [
+        ('value_unique', 'unique (value)', "The value must be unique"),
+    ]
diff --git a/openerp/tests/addons/test_impex/tests/test_load.py b/openerp/tests/addons/test_impex/tests/test_load.py
index fe01a267d58..0afbf6f49c3 100644
--- a/openerp/tests/addons/test_impex/tests/test_load.py
+++ b/openerp/tests/addons/test_impex/tests/test_load.py
@@ -1149,3 +1149,29 @@ class test_datetime(ImporterCase):
         self.assertEqual(
             values(self.read(domain=[('id', 'in', result['ids'])])),
             ['2012-02-03 11:11:11'])
+
+class test_unique(ImporterCase):
+    model_name = 'export.unique'
+
+    @mute_logger('openerp.sql_db')
+    def test_unique(self):
+        result = self.import_(['value'], [
+            ['1'],
+            ['1'],
+            ['2'],
+            ['3'],
+            ['3'],
+        ])
+        self.assertFalse(result['ids'])
+        self.assertEqual(result['messages'], [
+            dict(message=u"The value for the field 'value' already exists. "
+                         u"This might be 'unknown' in the current model, "
+                         u"or a field of the same name in an o2m.",
+                 type='error', rows={'from': 1, 'to': 1},
+                 record=1, field='value'),
+            dict(message=u"The value for the field 'value' already exists. "
+                         u"This might be 'unknown' in the current model, "
+                         u"or a field of the same name in an o2m.",
+                 type='error', rows={'from': 4, 'to': 4},
+                 record=4, field='value'),
+        ])