Index: opener_stack.php
===================================================================
--- opener_stack.php	(revision 14768)
+++ opener_stack.php	(working copy)
@@ -113,6 +113,7 @@
 	 * @param int $index Position of element in opener stack. Negative number will retrieve element from the end.
 	 * @param bool $raw
 	 * @return Array|string {$template, $params, $index_file}
+	 * @see kRequestManager::openerStackChange()
 	 * @access public
 	 */
 	public function get($index, $raw = false)
@@ -132,6 +133,10 @@
 		list ($index_file, $env) = explode('|', $this->data[$index], 2);
 		$params = $this->Application->processQueryString($env, 'pass');
 
+		// detect "__URLENCODE__" parameter value, used when opener stack element was built
+		// without it rebuilding opener stack element will convert all "&" to "&" elements
+		$params['__URLENCODE__'] = (strpos($env, '&') !== false && strpos($env, '&') === false) || (strpos($env, '\\') !== false && strpos($env, '%5C') === false) ? 1 : 0;
+
 		$template = kUtil::popParam('t', $params, '');
 
 		return Array ($template, $params, $index_file);