I had this problem back in November, but it seems solved now, after I updated my graphics driver.
I typically work on a notebook with a large extension monitor. The extension monitor is set as my primary display.
I usually have my view windows on the large (primary) display, and the Project Browser, Properties Browser and Stems Browser on my secondary (notebook) display. No real issues. I don't know how to check which update I have installed.
I installed update 2 for Revit MEP, then I installed the recent Hotfix (I think). Today, Revit just goes away when I try to open a 3D view. No lock up or error message. My build number is now 20121003_2115 (x64). Should I have a different build number after the Hotfix? The procedure was very cumbersome, not sure if I got it right.