protected function onInValid()
    {
        // We disable this standard error message as we are not changing anything here
        //$this->addMessage(sprintf($this->_('Input error! Changes to %s not saved!'), $this->getTopic()));

        if ($this->_csrf) {
            if ($this->_csrf->getMessages()) {
                $this->addMessage($this->_('The form was open for too long or was opened in multiple windows.'));
            }
        }
    }