Vista - Quake 4 after 1.42 Patch

Hello all,

Quake 4 runs fine without the 1.42 patch installed....
After installing the patch the singleplayer is fine but it seems multiplayer is broken.
If I start a server it loads the map but locks up straight away, also looks as though it's missing textures(random black spots)
It even crashes from menus if I try and change my character as its also missing textures (all black)

Ive tried uninstalling, reinstalling etc.

Latest Catalyst drivers, card is a 4870....

Running as admin, compatability mode etc make no difference, weird as it works fine with no patch, unfortuantely all the servers require 1.42.

I havent yet reinstalled Q4 on this new system, I'd like to know before I do whats going on.. I'll be watching this one closely too.

Strange though.. how my MOHAA ( how old is this game?? LOL ) loaded and runs great ..but some of the newer games are giving me a fit.

The sad thruth is that it's more than likely something to do with my drivers. After extensive googling for the last week I've yet to come across anyone who had MP only issues similar to mine. Whats weird is why is it only doing it in multiplayer :S

Three questions: do you have SP1, are you running the game as administrator and why are you starting a server?

SP1 installed, newest audio, gfx drivers, newest chipset drivers and bios update.
Tries running as admin and whole host of other compatability options.

Running server or joining another 1.42 server makes no difference, it crashes regardless.