I guess I am lucky. I've studiously avoided upgrading the firmware for my P3P, because "if it ain't broke, don't fix it." The AC has been flying wonderfully and problem free for 3 years on the firmware it had coming out of the box. Then 3 days ago, my iPhone inadvertently upgraded the firmware to version 3.1.50. When I discovered that this morning, I went right out and tested it. Up popped all sorts of privacy statements I had to sign off on and bunches of new accessory windows. After everything settled down, I got a normal screen, the AC took off and flew just fine. I was in a restricted space bounded by trees and a house, and the wind was gusting a little, so I didn't try height or speed tests, but otherwise, everything seemed fine. It will be a while before I'll have enough confidence in the upgrade before I fly over the ocean again.