In the past week I've had 2 blue screen of death's happen after closing Revit 2010. A couple of seconds after closing, both my displays go black, then get the blue memory dump screen.
If I recall, both instances happened early in the morning when I had opened a project, but then closed it without doing anything (no Save message appeared) and then closed Revit. I was doing this because of settings changed or whatever that might require a restart of the program. I'm about to open the project again, and then close it, just to see what happens.