i just tried importing a xmltv-file created with the tv_grab_fr grabber (just some random channels) and it worked fine...
can you post some <programme>-tags of the file?
what version of xmltv and gbpvr are you using (the last one does not really matter AFAK no part of the import xmltv-stuff has changed recently)?
AMD 1600mHz, 512 M RAM, 20+160 GB drive, Hauppauge PVR-350 + PVR-150 + PVR-150MCE, Win XP Pro SP3, using software decoding.
There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable.
There is another theory which states that this has already happened.
(The Restaurant at the End of the Universe)