[Beta3][Graphics] "lens" discolorations

Whenever I play E:WoM I have these yellow spots on certain sections of the screen. They do not move in their position regardless of scrolling the map. Sort of like a speck of dirt on a camera lens that stays in the same spot regardless of the camera's view point. They do not seem visible, though, when I scroll far back onto the high overhead/in the clouds view.

Comp Specs:

Windows XP
Processor:
AMD Athlon(tm) 64 X2 Dual Core Processor 4200+ 2.2 GHz
Graphics card:
NVIDIA GeForce 7900 GTX
Sound card:
Creative SB X-Fi
1 GB Ram
189 GB hard drive

I can't seem to get the link set up right so here's a direct link to the picture:

http://i1032.photobucket.com/albums/a406/thebossinthewall/discolorations.jpg