Great point Shadow! I forgot all about that, but I too notice it occurs more often when doing undos. It just now happened with a simple ball object, no lights except sun. I was trying to change a keyframe point. I drug it somewhere and POOF! I restarted Vue and was doing something else fairly basic, hit undo a couple of times and ... CRASH. Also, I recently had to reinstall Vue Pro because it simply refused to launch. I hadn't done anything major to that machine, and had not touched Vue Pro for some time. It just stopped working. Isn't that bizarre? It makes me really start to wonder about the whole anti-piracy scheme. That reminds me of something a program using that technique might do, no? If anyone from E-on is reading this ... why not just remove it with the next patch, so that we can at the VERY LEAST eliminate that as a suspect? PLEASE!