I'm not sure whats up with DivX...... I rendered a thirty second clip in Lightwave and it came out at about 700k with DivX and it looked almost as good as the 130mb render did. I read somewhere that DivX is just a hack and not to trust it. You might want to render fullframe and do it up in a video compositor. I think thats the best way anyhoo. You can reinstall the DivX app and see if that helps and be sure to read anything that came with it,I think I saw something in there about frame size come to think of it. My machine is working right now or I would go dig it out myself...... Hope this helps somewhat.........