Index: sql.py
===================================================================
--- sql.py	(revision 2889)
+++ sql.py	(working copy)
@@ -271,7 +271,7 @@
         identity['user'] = user
 
         user_memberships = getattr(user, self.translations['sections'])
-        return set([group.group_name for group in user_memberships])
+        return set([getattr(group, self.translations['section_name']) for group in user_memberships])
 
 
 class SqlPermissionsAdapter(_BaseSqlAdapter):