Ground texture has disappeared in all servers

https://fbcdn-sphotos-a-a.akamaihd.net/hphotos-ak-ash3/966759_10201322150285835_743247714_o.jpg

Any ideas?
I’ve already tried reinstalling and verifying the game cache.

Verify CS:S.

I’ve heard that there are some server that screw around with the materials or something. At least that’s what was in my situation with Counter Strike: Source.