Index: user_helper.php
===================================================================
--- user_helper.php	(revision 15374)
+++ user_helper.php	(working copy)
@@ -416,7 +416,9 @@
 		 */
 		protected function _injectLanguageIntoUrl($language_id)
 		{
-			$url = $this->Application->HREF($this->event->redirect, '', $this->event->getRedirectParams(), $this->event->redirectScript);
+			// solve problem, when template is "true" instead of actual template name
+			$template = is_string($this->event->redirect) ? $this->event->redirect : '';
+			$url = $this->Application->HREF($template, '', $this->event->getRedirectParams(), $this->event->redirectScript);
 			$vars = $this->Application->parseRewriteUrl($url, 'pass');
 
 			$vars['pass'] = implode(',', $vars['pass']);