[Wotlk] Rendering problem (not sure)

I'm not sure how to describe the problem. I'm having this only on WOTLK expansion based servers.

Screenshots of the problem:
http://epvpimg.com/dA0maab
http://epvpimg.com/waUrgab
http://epvpimg.com/y0lggab

Specs:
http://epvpimg.com/pQQ2bab