"CTD" but game still running - no crash.

[Strike]

Now I'm getting this error more often, without bombers in sight.

Suddenly screen goes black, shows desktop.. If I hit esc, it takes me to the ingame pause-menu. I have to quit the game and start it up again to play again. No graphics drivers crash during this event.

Drivers 270.51

Good FPS some settings low and others high. Happens both when in low settings and high settings, especially when viewing multi-crewed bombers..