We are having the same problem. Just installed GBPVR a few days ago so I'm still figuring it out. The first time I recorded a show it worked fine. I it up to record the entire season. Yesterday it only recorded min. and then stopped. But the entire time it said it was recording. I looked through the log files and don't know what went wrong.
Thanks, sub. I uninstalled GBPVR, my ATI drivers, and all the software that ATI had installed. Then I reinstalled GBPVR and the ATI drivers (without the software), and that appears to have fixed the problem.
I'm really impressed with GBPVR, by the way. It's much better than anything else I've used.