Index: branches/5.2.x/core/kernel/application.php
===================================================================
diff -u -N -r15457 -r15521
--- branches/5.2.x/core/kernel/application.php	(.../application.php)	(revision 15457)
+++ branches/5.2.x/core/kernel/application.php	(.../application.php)	(revision 15521)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: application.php 15457 2012-07-17 14:54:32Z alex $
+* @version	$Id: application.php 15521 2012-08-20 13:58:49Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -1224,7 +1224,11 @@
 
 		// flush all output
 		ob_end_flush();
-		ob_flush();
+
+		if ( ob_get_level() ) {
+			ob_flush();
+		}
+
 		flush();
 
 		// close current session