Index: branches/5.0.x/core/units/helpers/category_helper.php
===================================================================
diff -u -r12447 -r12459
--- branches/5.0.x/core/units/helpers/category_helper.php	(.../category_helper.php)	(revision 12447)
+++ branches/5.0.x/core/units/helpers/category_helper.php	(.../category_helper.php)	(revision 12459)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: category_helper.php 12447 2009-09-04 21:54:43Z alex $
+* @version	$Id: category_helper.php 12459 2009-09-08 10:04:45Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -149,7 +149,11 @@
 			$ret = '';
 			$block_params['category'] = 1;
 			$block_params['no_editing'] = 1;
-			$block_params['is_first'] = $params['is_first'];
+
+			if (array_key_exists('is_first', $params)) {
+				$block_params['is_first'] = $params['is_first'];
+			}
+
 			$block_params['separator'] = $params['separator'];
 			$no_current = isset($params['no_current']) && $params['no_current'];