Just upgraded from 8.0.2 to 8.2.1.
Two issues:
1) remote was acting strange, doing double keystrokes. This was fixed by turning off lirc. At the time, playback did work ok.
2) Since I turned off lirc, I have been unable to playback any videos from USB or youtube. I turned lirc back on, but still no playback.
Repeated the upgrade, still no playback. USB drives are available and files show properly, but nothing will play.