I had an interesting upgrade experience.. My stock F900BT died a few days ago, before I was able to install the 3.0 update. It would start and show my splash screen, then go to black.. Since I didn't want to pull the unit and send it in, I decided it was already broke and I couldn't make it any worse. I grabbed the 3.0 disks and set aside some time and went for a install.
An hour and a half later, it was back to life. It did stick and request a retry at 99%, but other than that it was smooth. It definately got me out of a jam!.
