Index: branches/RC/core/kernel/session/session.php
===================================================================
diff -u -r11368 -r11386
--- branches/RC/core/kernel/session/session.php	(.../session.php)	(revision 11368)
+++ branches/RC/core/kernel/session/session.php	(.../session.php)	(revision 11386)
@@ -985,6 +985,8 @@
 		}
 
 		$params['__URLENCODE__'] = 1; // uses "&" instead of "&" for url part concatenation + replaces "\" to "%5C" (works in HTML)
+
+		$params = array_merge($this->Application->getPassThroughVariables($params), $params);
 		$ret = $this->Application->BuildEnv($t, $params, 'all');
 
 		if (!$encode) {