--- a/entities/authobjs.py	Tue Feb 02 18:24:45 2010 +0100
+++ b/entities/authobjs.py	Wed Feb 03 14:46:32 2010 +0100
@@ -83,7 +83,7 @@
     def is_in_group(self, group):
         """convience / shortcut method to test if the user belongs to `group`
         """
-        return group in self._groups
+        return group in self.groups
 
     def is_anonymous(self):
         """ checks if user is an anonymous user"""