Graphics Problem (ATI / Titanium)

[SilentCurse]

Hi there.

I was hoping someone could point me in the right direction here, as I have not run into this problem previously. I had recently changed my video card from an Nvidia 8800 GTS to an ATI Radeon HD4850.

Now, whenever I try to play on any server, I get a strange graphic problem in the sense that... textures are missing.

Screenshots:




Any ideas? Obviously it has to do with my ATI HD4850 - I have tried the obvious updating graphics driver, reinstalling Titanium, etc. Any help would be appreciated.