I've found what I think to be a pretty serious bug with the way file renames are handled in Vista.  One of the cool new features in Vista is that you can select a bunch of files and rename them together.  This creates a sequence of files where the filenames are the same, but each has a different number at the end - e.g.

This is a guide for how to use the Group Policy Editor to replace the shell in windows with Media Center.  This is for Vista Ultimate only. Use this if you want to use a computer strictly as a Media Center computer. This will make it much more appliance like. Don't apply this if you want to use the computer as a standard computer. 

I love nvidia. I have been a fan ever since my TNT2 (suck it 3dfx). However it seems that nvidia doesn't care about keeping its loyal fans. They just released the new 8600 series cards, but they still don't have decent drivers for Vista yet.