You get a cookie for posting a screenshot, but I have a couple of questions.
Does this happen in many other places that you've seen, or just in that one spot?
What video card do you have?
EDIT: Also, DirectX 11 mode or DirectX 9 mode?
Might have seen it other places im not totally sure, i just noticed it in the office because it was so obvious a lighting issue it really stood out. So since it maybe a popular social location i thought i would bring it to your attention.
All maxed out settings, dx9 mode with a gtx 460 1gb. Latest WHQL drivers from nvidia.
The worst effect of the lighting is the feeling your about 1ft off the ground when your walking around, you can only tell your touching the floor if you use the camera and look directly sideways and low lol. Otherwise you feel like your walking 1ft in the air around that section due to the shadows lol.