Actually I am running RC2 which is far more stable than the beta builds as it's the final build before release. Only tweaks happened since RC2 to Final, this build is about 2 weeks old and it has gone gold 3 days ago. After running XP I would never go back to Win9x, which I left 2 years ago when I moved to Win2k. It might be an issue with WinXP but I doubt it since I started the animation with a different motion and it rendered 386 frames just fine. Btw, all my apps are running 100% stable in WinXP, and Vue 4 only crashed with these animations. :) Anyways, I will be ready to make Vue 4's review and it should be ready within a few days...and yes I will note that it's been tested under WinXP! :) Cheers!