Index: branches/5.3.x/core/kernel/nparser/nparser.php
===================================================================
diff -u -N -r16111 -r16395
--- branches/5.3.x/core/kernel/nparser/nparser.php	(.../nparser.php)	(revision 16111)
+++ branches/5.3.x/core/kernel/nparser/nparser.php	(.../nparser.php)	(revision 16395)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: nparser.php 16111 2014-12-07 14:49:01Z alex $
+* @version	$Id: nparser.php 16395 2016-11-12 12:43:14Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2009 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -140,6 +140,50 @@
 		$this->CachingEnabled = !$this->Application->isAdmin && $this->Application->ConfigValue('SystemTagCache') && $this->Application->isCachingType(CACHING_TYPE_MEMORY);
 	}
 
+	function Clear()
+	{
+		// 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;
+
+		$this->Buffers = array();
+		$this->InsideComment = false;
+
+		$this->SkipComments = true;
+
+		$this->Params = array();
+		$this->ParamsStack = array();
+		$this->ParamsLevel = 0;
+
+		$this->Definitions = '';
+
+		$this->Elements = array();
+
+		$this->ElementLocations = array();
+
+		$this->DataExists = false;
+
+		$this->TemplateName = null;
+		$this->TempalteFullPath = null;
+
+		$this->CachePointers = array();
+		$this->Cachable = array();
+
+		$this->CacheLevel = 0;
+
+		$this->FullCachePage = false;
+
+		$this->PrefixesInUse = array();
+
+		$this->Captures = array();
+	}
+
 	function Compile($pre_parsed, $template_name = 'unknown')
 	{
 		$data = file_get_contents($pre_parsed['tname']);