--- a/src/cm/models.py	Tue Aug 03 16:42:05 2010 +0200
+++ b/src/cm/models.py	Tue Aug 03 18:01:35 2010 +0200
@@ -600,10 +600,11 @@
     
         
     def create_inactive_user(self, email, send_invitation, **kwargs):
-        #prevent concurrent access 
-        cursor = connection.cursor()
-        sql = "LOCK TABLE auth_user IN EXCLUSIVE MODE"
-        cursor.execute(sql)
+        if 'postgresql' in settings.DATABASE_ENGINE:
+            #prevent concurrent access 
+            cursor = connection.cursor()
+            sql = "LOCK TABLE auth_user IN EXCLUSIVE MODE"
+            cursor.execute(sql)
         
         try:
             user_with_email = User.objects.get(email__iexact=email)

--- a/src/cm/tests/__init__.py	Tue Aug 03 16:42:05 2010 +0200
+++ b/src/cm/tests/__init__.py	Tue Aug 03 18:01:35 2010 +0200
@@ -6,4 +6,5 @@
 from cm.tests.test_history import *
 from cm.tests.test_security import *
 from cm.tests.test_activity import *
+from cm.tests.test_registration import *
 from cm.tests.test_api import *

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/cm/tests/test_registration.py	Tue Aug 03 18:01:35 2010 +0200
@@ -0,0 +1,16 @@
+from django.test import TestCase
+from django.test.client import Client
+from django.core import management
+
+
+from cm.models import *
+from cm.security import *
+from cm.tests.test_comment_positioning import create_comment
+
+
+class RegistrationTest(TestCase):
+    fixtures = ['roles_generic','test_content']
+    
+    def test_registration(self):
+        user = UserProfile.objects.create_inactive_user('no@noreply', False)
+        
\ No newline at end of file