Index: branches/5.2.x/core/kernel/utility/opener_stack.php
===================================================================
diff -u -N -r14795 -r14895
--- branches/5.2.x/core/kernel/utility/opener_stack.php	(.../opener_stack.php)	(revision 14795)
+++ branches/5.2.x/core/kernel/utility/opener_stack.php	(.../opener_stack.php)	(revision 14895)
@@ -1,6 +1,6 @@
 <?php
 /**
-* @version	$Id: opener_stack.php 14795 2011-11-24 09:42:03Z alex $
+* @version	$Id: opener_stack.php 14895 2011-12-21 12:35:05Z alex $
 * @package	In-Portal
 * @copyright	Copyright (C) 1997 - 2011 Intechnic. All rights reserved.
 * @license      GNU/GPL
@@ -130,12 +130,14 @@
 			return $this->data[$index];
 		}
 
-		list ($index_file, $env) = explode('|', $this->data[$index], 2);
-		$params = $this->Application->processQueryString($env, 'pass');
+		list ($index_file, $original_env) = explode('|', $this->data[$index], 2);
 
+		$fixed_env = str_replace(Array ('&amp;', '%5C'), Array ('&', '\\'), $original_env);
+		$params = $this->Application->processQueryString($fixed_env, 'pass');
+
 		// detect "__URLENCODE__" parameter value, used when opener stack element was built
 		// without it rebuilding opener stack element will convert all "&" to "&amp;" elements
-		$params['__URLENCODE__'] = (strpos($env, '&') !== false && strpos($env, '&amp;') === false) || (strpos($env, '\\') !== false && strpos($env, '%5C') === false) ? 1 : 0;
+		$params['__URLENCODE__'] = $original_env != $fixed_env ? 1 : 0;
 
 		$template = kUtil::popParam('t', $params, '');