L4D2 Missing Texute - TANK!!!

[razer121]

Erm....take a look



Whats wrong there? Oh yes...the tank is invisible! you can see the blood coming of it, but not the tank. Has anyone else had this problem?

a few things ive tried already,

reinstalled the game
contacted steam support (who have asked for a msinfo)
checked the integrity of the game cache - this fix's it for abit then it comes back

drivers upto date

so....any ideas?

""edit""
I forgot to add the picture...