Been playing for about a week now, but the problem arose the 27th (had it anything to do with maintenance?). Basically what happens (after about half an hour of play, has been happening quicker and slower though) is that the screen flickers for a second and then it turns black. I can still the in-game cursor, I can still use all of my hotkeys and run around healing/fightin/dying. No it's not a blinding effect since it also happens out of combat and in the middle of town.

I can alt-tab out to my desktop just fine, here everything shows up normally and stuff. I can alt-tab back in but the screen remains black... which lead me to believe that it is not a monitor error.

It never happens outside of DDO either. I've been playing both Bad Company 2 and League of Legends without a flaw, which I guess would mean that there's something uniquely that DDO does to screw with my computer?

Things I've done are:

Updated my drivers
Updated my directx11


Neither helped. I don't believe it's the graphics card either, but then again I have no idea why this happens. I'm on a Windows 7 64-bit and my graphics card is a Nvidia GT8800. I mean it's so weird, I could play the game for hours on end in the beginning without this happening and then 3-4 days later... BAM!