I am running an NVIDIA 560M with 301.42 drivers. I turned off Nameplate scaling and it resolved most of the stuttering, however the stuttering shows up again if I target a mob and move, or if I target my companion and move, or right after I have targeted a mob but no longer are targeting it but have not un-targeted it, (for instance after a fight ends) even though there is nothing shown in the target portrate pain. (in the last case, the stuttering stops imediately if I click on the environment, effectivly un-targeting what ever I had targeted.)
Why isn't this issue on the list of known issues for 1.4?
http://www.swtor.com/community/showthread.php?t=403398
Please acknowledge this issue. I hope a fix comes soon.