Index: branches/5.1.x/core/units/helpers/user_helper.php
===================================================================
diff -u -N -r14106 -r14135
--- branches/5.1.x/core/units/helpers/user_helper.php	(.../user_helper.php)	(revision 14106)
+++ branches/5.1.x/core/units/helpers/user_helper.php	(.../user_helper.php)	(revision 14135)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: user_helper.php 14106 2011-01-05 10:16:16Z alex $
+* @version	$Id: user_helper.php 14135 2011-01-09 14:51:45Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -188,7 +188,7 @@
 
 			// store groups, because kApplication::CheckPermission will use them!
 			array_push($groups, $this->Application->ConfigValue('User_LoggedInGroup') );
-			$this->Application->StoreVar( 'UserGroups', implode(',', $groups) );
+			$this->Application->StoreVar( 'UserGroups', implode(',', $groups), true ); // true for optional
 
 			return $this->Application->CheckPermission($this->Application->isAdmin ? 'ADMIN' : 'LOGIN', 1);
 		}