Ya I get the name jittering too when moving around but thats a different problem.
I have tried all kinds of different settings and even set things to the lowest level it really doesn't make a difference. the framerate on the game is high i can get 40's and up with the highest settings but the stuttering will take it down for just a split second and then its back up in teh 40's. I notice it outside of the towns but it's less apparent there and it does seem to ease up after a while which tells me it's some sort of caching issue.