GAH TRIPLE POST!!!!
I installed the fix. It didn't fix my problem but it did make my game run smoother! :)
I highly doubt that, its for making the game actually run slower on older (bugged) AMD 64x processors. Now back to your problem.
Try editing your Avatar Appearance if you haven't already. If you somehow managed to select a non existing torso texture (by events for example), it will show up invisible.