I'm not too sure what's going on here, but I've tried playing with multiple settings on my graphics card and in-game to try and rectify the problem, but to no avail.
Here are some screenshots taken in quick succession:
https://dl.dropbox.com/u/89706540/ScreenShot1.bmp
https://dl.dropbox.com/u/89706540/ScreenShot2.bmp
My important system specs are as follows:
nVidia (EVGA) Geforce GTX 660- superclocked
Core i7 960 @ 3.2gHz
8GB of DDR3 RAM