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