diff --git a/addons/report_intrastat/report/report_intrastat_report.py b/addons/report_intrastat/report/report_intrastat_report.py
index 012fd84ea1b..3ff63b4a4f6 100644
--- a/addons/report_intrastat/report/report_intrastat_report.py
+++ b/addons/report_intrastat/report/report_intrastat_report.py
@@ -36,7 +36,7 @@ class ReportIntrastat(models.Model):
                     intrastat.id as intrastat_id,
                     upper(inv_country.code) as code,
                     sum(case when inv_line.price_unit is not null
-                            then inv_line.price_unit * inv_line.quantity
+                            then inv_line.price_unit * (1.0 - coalesce(inv_line.discount, 0.0) / 100.0) * inv_line.quantity
                             else 0
                         end) as value,
                     sum(
diff --git a/odoo/addons/base/res/ir_property.py b/odoo/addons/base/res/ir_property.py
index c8aa6bddf26..810e41d17ff 100644
--- a/odoo/addons/base/res/ir_property.py
+++ b/odoo/addons/base/res/ir_property.py
@@ -50,9 +50,9 @@ class Property(models.Model):
 
     @api.multi
     def _update_values(self, values):
-        value = values.pop('value', None)
-        if not value:
+        if 'value' not in values:
             return values
+        value = values.pop('value')
 
         prop = None
         type_ = values.get('type')
@@ -68,7 +68,9 @@ class Property(models.Model):
             raise UserError(_('Invalid type'))
 
         if field == 'value_reference':
-            if isinstance(value, models.BaseModel):
+            if not value:
+                value = False
+            elif isinstance(value, models.BaseModel):
                 value = '%s,%d' % (value._name, value.id)
             elif isinstance(value, (int, long)):
                 field_id = values.get('fields_id')
diff --git a/odoo/addons/test_new_api/tests/test_new_fields.py b/odoo/addons/test_new_api/tests/test_new_fields.py
index fd2ce1426c3..1d982c4bb9b 100644
--- a/odoo/addons/test_new_api/tests/test_new_fields.py
+++ b/odoo/addons/test_new_api/tests/test_new_fields.py
@@ -585,6 +585,12 @@ class TestFields(common.TransactionCase):
         self.assertEqual(record.sudo(user1).foo, 'alpha')
         self.assertEqual(record.sudo(user2).foo, 'default')
 
+        record.sudo(user1).foo = False
+        record.invalidate_cache()
+        self.assertEqual(record.sudo(user0).foo, 'main')
+        self.assertEqual(record.sudo(user1).foo, False)
+        self.assertEqual(record.sudo(user2).foo, 'default')
+
         # create company record and attribute
         company_record = self.env['test_new_api.company'].create({'foo': 'ABC'})
         attribute_record = self.env['test_new_api.company.attr'].create({
diff --git a/odoo/models.py b/odoo/models.py
index fb786628bcd..6bd97d1ee18 100644
--- a/odoo/models.py
+++ b/odoo/models.py
@@ -893,6 +893,7 @@ class BaseModel(object):
                 # avoid broken transaction) and keep going
                 cr.execute('ROLLBACK TO SAVEPOINT model_load_save')
             except Exception as e:
+                _logger.exception("Error while loading record")
                 message = (_('Unknown error during import:') + ' %s: %s' % (type(e), unicode(e.message or e.name)))
                 moreinfo = _('Resolve other errors first')
                 messages.append(dict(info, type='error', message=message, moreinfo=moreinfo))