Index: branches/5.2.x/core/units/configuration/configuration_tag_processor.php
===================================================================
diff -u -N -r14244 -r14596
--- branches/5.2.x/core/units/configuration/configuration_tag_processor.php	(.../configuration_tag_processor.php)	(revision 14244)
+++ branches/5.2.x/core/units/configuration/configuration_tag_processor.php	(.../configuration_tag_processor.php)	(revision 14596)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: configuration_tag_processor.php 14244 2011-03-16 20:53:41Z alex $
+* @version	$Id: configuration_tag_processor.php 14596 2011-09-29 15:46:43Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -163,7 +163,7 @@
 		$field_options = $object->GetDBField('Validation');
 		$field_options = $field_options ? unserialize($field_options) : Array ();
 
-		return array_key_exists('required', $field_options) && $field_options['required'];
+		return isset($field_options['required']) && $field_options['required'];
 	}
 
 	function Error($params)