@leachim: what's the exact error message you are getting when clicking the gps-button? Can you reproduce the error even after you have used the gps-receiver (e.g. with the Maps program or some other GPS-program)?

This information would help me, because I just had a look at the code and it seems reasonable…

Only thing I would change, are METHOD and INTERVAL for the GPS device, as the default interval could be very long to obtain a fix, and method could be set to require a data-link, as a data-connection is required anyway for fahrplan, and the fix is way faster with such a method…