I know what error you're referring to. No matter what video card I use (ATI or Nvidia), edition of Windows (Home Premium, Professional, Ultimate) (x86 or x64), I get this issue. The way to resolve it at least temporarily is to go into Task Manager and restart the explorer.exe application. Once that's done, the issue is fixed. You can also log off and logon again and it effectively does the same thing.
I am curious though, do you have the Quick Launch toolbar enabled? (Trying to find a pattern because so far, it's hard to convince people that this is a bug)