Hello.

First of all my apologies if I am posting in the wrong section. It has been a few months since I played Skyrim on PC, but yesterday I purchased the Dawnguard expansion. I haven't started it yet but I have been doing some quests I had from the main plot. Anyway I have noticed that light/shadows/clouds transitions now exhibit some sort of nasty wireframe effect that moves when I am moving and provide a slight dizzy effect. I don't remember seeing this glitch before. My hardware is exactly the same (HD Radeon 3870) and I have tested Catalyst drivers 12.1, 12.4, 12.4b and 12.6 Every single version performs exactly the same. I am thinking this is a bug in Skyrim. Enclosed is one captured screen. Any ideas?

http://img204.imagevenue.com/img.php?image=100896204_ScreenShot3_122_378lo.jpg