typerules and german umlauts

Hello ! i have the following problem: when using sendfax for sending a german text file including german umlauts, i get: cannot determine file type ?!? does anyone know how to modify typerules to handle that file type correctly ? one strange thing: when i try to sendfax from the shell, everything works fine. when trying it from within php, the error occurs ?!? i even tried it as user nobody (= apache-user) in a shell.... it works fine.... when i tried it from within php, it doesn´t... :-((( it would be great if anyone could give me a hint.... thank you ! ps: please reply also to otto@liwest.at as i am not subscribed to the mailing list. thanks a lot !