I have a problem.. It appeared today when in entered the game. When i turn around, third person or first person, doesn't matter, all that's on screen appear much darker than normal (even all black), doesn't matter if it's night or day, and after 3-4 seconds return to normal. If i look at some stairs, for example it appears much lighter than normal, not darker.

I was looking on Google: not even a person with this problem.

I made a movie with FRAPS:

http://youtu.be/J39bttz7rQo

I think it's this problem:
* The system that auto adjusts brightness (dims/brightens lights as you look and move around) - any chance of a way to disable this? It seems hyperactive on some systems.(source: Unofficial Buglist - http://www.gamesas.com/topic/1331118-unofficial-buglist/ )

Sorry for my english...

And, please help me, this is the game i play mostly.

It's normal HDR auto exposure. Everyone has it and it's to be expected.