Just flashed the 12/21 nightly with 11, and man on man, what a sweet ride.
However, one thing has been broken since I first used the 10.2 (on my LG G2 Vzw)--when on a phone call, after a minute or so (sometimes a few seconds, sometimes more than a minute), if I take the phone away from my ear and try to use the screen, I find that it is locked automatically, and I have to double-knock or use the power button to then be able to access the screen (If the other party hangs up the screen activates). This is a problem for obvious reasons (which include hanging up if I don't want to leave a voice mail, using the keypad for entering account numbers, etc).
Can anyone confirm that this happens? It's like the proximity sensor is not telling the software that there's nothing nearby anymore. Or maybe this is as simple as an auto screen lock that should not be happening if on a phone call while proximity sensor active.