Crysis 1.2 Patch problems

So After a few months of waiting I finally decided last weekend to take the plunge, buy crysis, and see what my computer could do. When I installed the game, i searched for patches and sure enough found that crytek had just released 1.2. Thinking that only good things could come, i quickly patched the game and loaded it up.

Unfortunately, everything has not gone well. Every single humvee i encounter in the game seems to have no rear wheels at all.   They're there all right, if you shoot where the tires should be they pop and the rim appears, and the truck drives fine, but i can't see them. Also, during the cutscene where you find the frozen ship (the end of the demo) everyone appears to be holding huge black boxes instead of guns.

At first i thought it was a problem on my end, so i looked for newer drivers (there weren't any) and tried downclocking my GPU in case it was a heat issue. No luck. I played through the entire demo before buying crysis and never experienced any of these glitches, so i don't know what to think.

Should i uninstall any go back to 1.1 or even vanilla crysis?  

I am running:
EVGA 8800GTS 320
E4300 @ stock speeds
2 gigs of Patriot DDR2 - 800 @ 4-4-4-12
Thanks in advance, Joetheone