diff --git a/VERSION b/VERSION
index 5d50c0df..9e9fcba8 100644
--- a/VERSION
+++ b/VERSION
@@ -1 +1 @@
-Version 2.4.5-stable+timestamp.2013.04.01.09.31.59
+Version 2.4.5-stable+timestamp.2013.04.01.12.44.20
diff --git a/gluon/contrib/login_methods/ldap_auth.py b/gluon/contrib/login_methods/ldap_auth.py
index 46ca4bca..0c832880 100644
--- a/gluon/contrib/login_methods/ldap_auth.py
+++ b/gluon/contrib/login_methods/ldap_auth.py
@@ -653,7 +653,8 @@ def ldap_auth(server='ldap', port=None,
         ldap_groups_of_the_user = list()
         for group_row in group_search_result:
             group = group_row[1]
-            ldap_groups_of_the_user.extend(group[group_name_attrib])
+            if type(group) == dict and group.has_key(group_name_attrib):
+                ldap_groups_of_the_user.extend(group[group_name_attrib])
 
         con.unbind()
         logger.debug('User groups: %s' % ldap_groups_of_the_user)