Index: branches/5.2.x/core/units/helpers/permissions_helper.php
===================================================================
diff -u -N -r13840 -r14092
--- branches/5.2.x/core/units/helpers/permissions_helper.php	(.../permissions_helper.php)	(revision 13840)
+++ branches/5.2.x/core/units/helpers/permissions_helper.php	(.../permissions_helper.php)	(revision 14092)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: permissions_helper.php 13584 2010-05-19 07:44:09Z alex $
+* @version	$Id: permissions_helper.php 14092 2010-11-26 22:43:15Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -539,13 +539,16 @@
 				return $name == 'SYSTEM_ACCESS.READONLY' ? 0 : 1;
 			}
 
+			if (!isset($cat_id)) {
+				$cat_id = $this->Application->GetVar('m_cat_id');
+			}
+
 			if ($type == 1) {
 				// "system" permission are always checked per "Home" category (ID = 0)
 				$cat_id = 0;
 			}
-
-			if (!isset($cat_id)) {
-				$cat_id = $this->Application->GetVar('m_cat_id');
+			elseif ("$cat_id" === "0") {
+				$cat_id = $this->Application->getBaseCategory();
 			}
 
 			// perm cache is build only based on records in db, that's why if permission is not explicitly denied, then
@@ -612,7 +615,7 @@
 					$cat_hierarchy = $this->Conn->GetOne($sql);
 					if ($cat_hierarchy === false) {
 						// category was deleted, but refrence to it stays in other tables -> data integrity is broken
-						$cat_hierarchy = '|' . $this->Application->findModule('Name', 'Core', 'RootCat') . '|';
+						$cat_hierarchy = '|' . $this->Application->getBaseCategory() . '|';
 					}
 				}