When entering the circular chamber with the 3 tentacle boss to kill it, the brightness gets set way too low. I noticed it when the room loaded walking through the airlock, and it stayed that way until I left the room by the bottom exit.
To be able to navigate the room I had to turn the brightness all the way up in options, and once I exited the room the brightness reverted to normal levels.
Core i3 2120 @3.3 gigglehurtz : BX80623I32120
EVGA GTX 560 1gb 850MHz : 01G-P3-1463-KR