I run sony vegas 8 and it has always been fine up until recently. When I try to render a video now as .avi with the xvid codec the video comes out all distorted. When played it has random times when the screen becomes mostly black boxes and distorted. The source is perfectly fine and I have rendered like this before without this happening. Should you want to see for yourself what I mean you can look at wowtestvid.avi Download File on FileFront It's a short 40mb 1 minute warcraft video. Any help to get this out of my videos would be great.