Choppy screen movement

I have been playing for about three weeks now, but over the past two days I have developed a choppy movement on screen. Other players move about fine and the camera rotates smoothly. When my character attempts to move it is not smooth, more jerks than anything. I am fairly certain that it isn't a connection issue because when I have to load new content I am downloading at around 200kb/s. I have attempted to defrag and rebuild the GW.dat file, but that didn't help. Do you have any idea what could be causing this? I don't think anything has changed to cause
this sort of problem.

The past two day for me as well, my game has completely froze and I had to restart the computer...wierd

Same happened for me yesterday, but today i'm fine.

Yes something is really wrong!