Maestral, thanks for the tip!
I tried unchecking the "...while dragging window", but it's still happening...
I notice that this thing happens only when I doubleclick the titlebar, not when I'm clicking maximize- or restore buttons.
And the most regular way to get this error to occur is to put some other window on top, and then, while AS still is in the background, click on the titlebar. Then it explodes, everytime....
Gcharb, I have 512 mb on the graphics card,
3,25 GB system RAM, running AMD phenom II X4 955
I have no problem whatsoever running Maya 2011, for instance....
And actually I have been running single monitor now for a couple of weeks..... same thing.