Bad replays.

[Mad_Dog]

I use Vista, and I have my SB games installed in C:\Program Files, which means Vista puts any file created by the program in a Temp folder... At least that is how I understand it. I delete everything in that temp folder periodically. If this isn't the case for you, then just cleaning out .bte files and the .xxx and .yyy files should work. Be careful though, don't break anything with my advice. ;)