From what I have read on other forums, Asus has started shipping new TFP 201s with a new unibody. This does not help those that already have a TFP or a for those who purchase the units that were shipped before the change. I have also read that if you want your unit fixed.. You can call in to Asus and file a warranty claim, you will have to ship your tablet to them and they will fix it.
Again, I this is only what I have read. If you have a current model you will have to call them to be sure.
Also the new back shown in the picture. Is for the up coming TF700F and it has much more in store than just a new unibody.