Index: branches/5.2.x/core/kernel/nparser/nparser.php
===================================================================
diff -u -N -r16270 -r16348
--- branches/5.2.x/core/kernel/nparser/nparser.php	(.../nparser.php)	(revision 16270)
+++ branches/5.2.x/core/kernel/nparser/nparser.php	(.../nparser.php)	(revision 16348)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: nparser.php 16270 2015-09-27 09:55:42Z alex $
+* @version	$Id: nparser.php 16348 2016-07-10 19:41:11Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -142,9 +142,13 @@
 
 	function Clear()
 	{
-		// Discard any half-parsed content.
-		ob_clean();
+		// Discard any half-parsed content (e.g. from nested RenderElements).
+		$keep_buffering_levels = kUtil::constOn('SKIP_OUT_COMPRESSION') ? 1 : 2;
 
+		while ( ob_get_level() > $keep_buffering_levels ) {
+			ob_end_clean();
+		}
+
 		$this->Stack = array();
 		$this->Level = 0;