Guild Wars 2

Hi
I am finding recently that my Character (toon) while in game is twitching up and down
I have changed the graphic settings and still does not change the slight twitch.
I have never seen this before. I am running a 4core with a GTX560 and 8 GB of Ram
I also have the latest Video Drivers
Any Suggestions how to stop this?

Take off (or hide) your Aviator Cap.

Wow!
I never would have guessed that it was cliping
I hid the cap and now all is back to normal

Yhanks for your help Da Kril.2695

Cheers
Shrew