I just updated my NA Unlocked Pre 2 and so far it is working, I do not like the phone app but that is another issue.
My problem right now is that I have not been able to use the web browser. I do not have a data plan so I connect using Wifi. I have Facebook, I can sync my hotmail, got preware, etc.. the web browser and the new you tube app (which looks like opens a web browser card) do not work at all. They show me the gray screen with the spinning circle in the middle and nothing happens.