Flickering Brightness/Darkness

[UprightMonkey]

I'm experiencing a very strange bug while playing Amnesia: The Dark Descent. It seems that the brightness is flickering when light sources leave my field of vision. Basically the light levels are normal when I have a light source on screen but as soon as the light source is off the screen the entire screen goes black. Its causing me to lose immersion into the game which is why I play.

For example I can light a candle and stand right beside it, but if the candle is not actually being looked at, the entire room appears very very dark. I've tried updating to 1.2 but to no avail. I'm using XP SP3, the latest graphic drivers/direct X, and have no background applications running. My card is a Nvidia Geforce 8800 GTX.

Any insight into this matter would be greatly appreciated.