Index: branches/5.1.x/core/units/categories/categories_event_handler.php
===================================================================
diff -u -N -r13987 -r14027
--- branches/5.1.x/core/units/categories/categories_event_handler.php	(.../categories_event_handler.php)	(revision 13987)
+++ branches/5.1.x/core/units/categories/categories_event_handler.php	(.../categories_event_handler.php)	(revision 14027)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: categories_event_handler.php 13987 2010-10-19 08:57:53Z alex $
+* @version	$Id: categories_event_handler.php 14027 2010-11-01 20:13:39Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -1923,7 +1923,7 @@
 			}
 			else {
 				// sort by parent path on Front-End only
-				$list_sortings = $this->Application->getUnitOption($event->Prefix, 'ListSortings');
+				$list_sortings = $this->Application->getUnitOption($event->Prefix, 'ListSortings', Array ());
 				$list_sortings['']['ForcedSorting'] = Array ("CurrentSort" => 'asc');
 				$this->Application->setUnitOption($event->Prefix, 'ListSortings', $list_sortings);
 			}