Index: /home/jordan/workspace/zend-framework/library/Zend/Controller/Dispatcher/Standard.php =================================================================== --- /home/jordan/workspace/zend-framework/library/Zend/Controller/Dispatcher/Standard.php (revision 7102) +++ /home/jordan/workspace/zend-framework/library/Zend/Controller/Dispatcher/Standard.php (working copy) @@ -348,7 +348,7 @@ public function isValidModule($module) { $controllerDir = $this->getControllerDirectory(); - return ((null !== $module) && isset($controllerDir[$module])); + return (is_string($module) && isset($controllerDir[$module])); } /**