This is happening to me seriously badly today.
I suffer from this problem regularly but it rarely boots me out of the game. Usually the game will freeze, with a black screen, and after a few seconds I’ll be able to play again. It’s problematic when faced with mobs/players to fight, but it’s only rarely killed me.
I’d still rather it didn’t happen though.
I’ve follwoed the guidelines in the stickies and tried a number of NVidia drivers with no success.
Today it’s gotten even worse. I’ve crashed twice in the last hour in WvW. I’ll get a few black screen pauses and then the game completely crashes. Tabbing gives me a window that reports video driver errors.
One thing I have noticed is that Firefox always crashes when this graphical glitch happens. I always have a window saying Firefox has encountered a problem. I have run the game with FF off and it makes no difference. Could there be a relation?