http://wiki.schmidtmarcel.de/logfile-magecoremodelurl-php-on-line-341/
$a = explode('/', $data);
ändern in
if (is_object($data)) {
$sO = get_object_vars($data);
//empty for admin login
if (empty($sO)) $a = explode('/', $data);
else return $this;
} else $a = explode('/', $data);
