It first happened when I inserted Series 5 Disc 1. DVDFab start scanning the disc and then crash, offering to send an error report. I then tried Disc 2 in the same series, same result.

I tested the discs with DVD Decrypter, and it copied without any problems. To double check, I downloaded and installed a trial of another DVD copying program. That worked too without a hitch.

I went back to DVDFab, and it crashed. I submitted the error report, and also emailed the IFO files in a separate email. Tomorrow I'll try the 3rd disc in this series and see what happens.