Another bug!
I turned on my player this morning and everything's fine. But once you start playing the movie (Bluray, DVD, avi from USB) the screen turns black and doesn't show any audio. You have to push stop then setup on the remote to make the settings screen reappear. Play again and the screen turns black once more.
Audio is fine, though.
What I did was turn off the player, unplug it from the socket, wait about five seconds, plug it back, wait for the boot screen to finish then turn it on. Everything came back to normal like nothing happened.
Only happened to me once, so far...