After using Visual Studio 2012 for several months now I'm having to change the way I work due to the instability of its abilty ot handle multiple tab groups. If I split the main window into two to display two sets of files, or even drag out a file to create a floating set of tabs, there is a greatly increased chance of VS crashing.
The crash seems to happen most when I attempt to cut and paste for some reason though is liable to crash at random times when inactive, typing, or going to definitions.
When working without tabs I find the frequency of crashing drops noticably. With tabs its been known to crash 10 times in an hour. Without, I haven't had one in the last two days.