Index: branches/5.1.x/core/kernel/globals.php
===================================================================
diff -u -N -r14241 -r14325
--- branches/5.1.x/core/kernel/globals.php	(.../globals.php)	(revision 14241)
+++ branches/5.1.x/core/kernel/globals.php	(.../globals.php)	(revision 14325)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: globals.php 14241 2011-03-16 20:24:35Z alex $
+* @version	$Id: globals.php 14325 2011-05-20 08:10:28Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -362,7 +362,11 @@
 			curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
 
 			curl_setopt($ch,CURLOPT_REFERER, PROTOCOL.SERVER_NAME);
-			curl_setopt($ch,CURLOPT_USERAGENT,$_SERVER['HTTP_USER_AGENT']);
+
+			if ( isset($_SERVER['HTTP_USER_AGENT']) ) {
+				curl_setopt($ch, CURLOPT_USERAGENT, $_SERVER['HTTP_USER_AGENT']);
+			}
+
 			curl_setopt($ch,CURLOPT_FOLLOWLOCATION, 0);
 			curl_setopt($ch, CURLOPT_TIMEOUT, 90);