Fullscreen Mode + Alt-Tab = hard crash

Something has changed in the past 3 days. I can no longer alt-tab out of game without crashing, forcing a FULL SYSTEM RESTART. I am no doing anything differently than before. What did you change, GGG??!!?!

I've noticed a few few crash threads that seem to circle around Nvidia cards. Do you have any info or a fix for this problem??

My friend and I have the exact same issue.
It crashes when I Alt+Tab and it freezes my computer for a few minutes.