Index: opener_stack.php
===================================================================
--- opener_stack.php	(revision 14917)
+++ opener_stack.php	(working copy)
@@ -131,13 +131,12 @@
 		}
 
 		list ($index_file, $original_env) = explode('|', $this->data[$index], 2);
-
 		$fixed_env = str_replace(Array ('&', '%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 "&" elements
-		$params['__URLENCODE__'] = $original_env != $fixed_env ? 1 : 0;
+		// opener stack is used from JavaScript / redirecting, so any "&" could break it
+		$params['__URLENCODE__'] = 1;
 
 		$template = kUtil::popParam('t', $params, '');