That's an odd one, looks like a shader glitch of some sort?

I'm on a truly awful ATI Radeon Xpress 200M - X300 without dedicated memory - and I haven't had that yet, so its not related to old shader models, could be geforce7-specific?

I started the game from the same save again and the problem went away, so I don't think the save would do much to help.

I had that back when i was using Radeon 9250, but that card was DirectX 8.1 with only a SM 1.1 support (IIRC), so it shouldn't be the same problem with that card. I've since used Radeon 9600, Radeon x1550, and currently Geforce 9600GT and none of them have had that problem.

yaya finaly someone made a screenshot

i've had this twice b4,  once in a 8 player ffa, we rehosted it afterwards without thinknig about a screenshot..... :/

second was in a 3 v 3 map, where the host immediatly disconnected after shouting something about fucking particles  i didnt had enough time to search my keyboard for that prtin screen button >.>