Index: branches/5.2.x/core/units/helpers/category_helper.php
===================================================================
diff -u -N -r15318 -r15782
--- branches/5.2.x/core/units/helpers/category_helper.php	(.../category_helper.php)	(revision 15318)
+++ branches/5.2.x/core/units/helpers/category_helper.php	(.../category_helper.php)	(revision 15782)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: category_helper.php 15318 2012-04-25 08:24:13Z alex $
+* @version	$Id: category_helper.php 15782 2013-05-25 15:13:43Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -150,14 +150,19 @@
 				}
 
 				$base_category = $this->Application->getBaseCategory(); // "Content" category
-				$index_category = $this->findIndexCategoryId($items_by_parent[$base_category]);
 
-				// rename "Content" into "Home" keeping it's ID
-				$items_by_parent[$parent_mapping[$base_category]][$base_category]['l1_Name'] = $this->Application->Phrase('la_rootcategory_name');
+				if ( isset($items_by_parent[$base_category]) ) {
+					$index_category = $this->findIndexCategoryId($items_by_parent[$base_category]);
 
-				// remove category of "index.tpl" template
-				unset($items_by_parent[$base_category][$index_category]);
-				unset($parent_mapping[$index_category]);
+					// rename "Content" into "Home" keeping it's ID
+					$items_by_parent[$parent_mapping[$base_category]][$base_category]['l1_Name'] = $this->Application->Phrase('la_rootcategory_name');
+
+					if ( $index_category !== false ) {
+						// remove category of "index.tpl" template
+						unset($items_by_parent[$base_category][$index_category]);
+						unset($parent_mapping[$index_category]);
+					}
+				}
 			}
 
 			$data = $items_by_parent[$parent_mapping[$parent_category_id]][$parent_category_id];
@@ -350,7 +355,7 @@
 			$templates = $this->Conn->GetCol($sql, 'CategoryId');
 
 			$base_category = $this->Application->getBaseCategory();
-			
+
 			if ( isset($templates[$base_category]) ) {
 				// "Content" category will act as "Home Page"
 				$templates[$base_category] .= '/Index';