Hopefully, the write hit a single bad sector that was lurking in an unused space. It's happened to me a few times. Belatedly, its a good idea to do bad-sector check with scandisk, periodically, with new drives. I've also learned to make md5 or sha checksums of all my data, because a bad sector can be automatically replaced by the drive's hardware, but when copies the data off the old sector, and sees a crc mismatch, it'll retry until it hits the first thing that matches the crc - that's usually wrong, and gives you a glitch in your avi, or trashes a smaller file. So it'd be a good idea to play all your files back.

Anyway, enough of that kind of talk. This project is going to be niiiiiiice.

Merry Christmas!