Error 400 Ambiguous URI path separator

HTTP ERROR 400 Ambiguous URI path separator

URI:	http://raago.no/404/index.php%3Froute=recipe%2Frecipe&search=gul+l%C3%B8k?route=recipe%2Frecipe&search=gul+l%C3%B8k
STATUS:	400
MESSAGE:	Ambiguous URI path separator