Overall it is working much better than previous versions but the same thing has happened to me twice. I was listening to Bluetooth Audio on my iPhone 5 and stopped at a store. When I got back in and started the car back up, the entertainment section could not connect to Bluetooth Audio and the lines on my Backup camera (straight and based on how the wheel is turned) disappeared. I had to go into settings and turn the lines back on. Also after this happens, when I switch to my USB thumb drive, it restarts at the first song instead of at the song / album I was last listening to.
But at least when this does happen it will connect back up to Bluetooth Audio in a minute or two. With 3.0.2, the Bluetooth Audio connection was toast until it decided to reconnect, which took a while.