Hey guys, we all know that MnB hates the alt tab.
Anyway, there's a neat little workaround for this, and it's simply Alt+Enter.
It'll window your game, allowing you to alt + tab from there WITHOUT the epic crash.
note: If you alt + enter wiithout another window, the game won't minimize, in which case bringing up the task manager (ctrl+alt+del) will give you a new window for you to switch with.
I usually have iTunes up or my Steam Friends list. SOoooo.. Hope this helps a little!
Dexxt