Index: branches/5.1.x/core/kernel/utility/http_query.php
===================================================================
diff -u -N -r14241 -r14325
--- branches/5.1.x/core/kernel/utility/http_query.php	(.../http_query.php)	(revision 14241)
+++ branches/5.1.x/core/kernel/utility/http_query.php	(.../http_query.php)	(revision 14325)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: http_query.php 14241 2011-03-16 20:24:35Z alex $
+* @version	$Id: http_query.php 14325 2011-05-20 08:10:28Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -105,7 +105,7 @@
 		$this->Conn =& $this->Application->GetADODBConnection();
 		$this->Order = $order;
 
-		if (array_key_exists('HTTP_X_REQUESTED_WITH', $_SERVER) && $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest') {
+		if ( isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] == 'XMLHttpRequest') {
 			// when AJAX request is made from jQuery, then create ajax variable,
 			// so any logic based in it (like redirects) will not break down
 			$_GET['ajax'] = 'yes';