Hi. I can totally empathize with your situation. I was very satisfied with my BDP-1 using LL. Since installing MM the player has been plagued with problems that include, music skipping, locked front panel display (stuck on a track played) front panel display going black within first couple of tracks, MM album art doesn't match current track, player becomes unresponsive to all inputs including front panel buttons.
I do seem to have resolved all these issues by doing the following. Turn the player off and unplug the AC cord for a minute or two. Plug it in and turn it on and allow it to boot up. Once its ready to play, before playing any music, using the dashboard check for updates and re-install the current s2.06 2014 10 07. After doing this I have been able to use the player on two different listening sessions of a few hours each and the player functioned flawlessly. I hope the problems are corrected permanently, only time will tell.
Oh and by the way, I didn't like the MM or the LL UI's at all so I have installed MPDroid on my android phone and tablet and really prefer this method of controlling my BDP-1. Its very simple to use and visually more satisfying than the cluttered look of MM in my opinion.
I hope you can resolve your problems.
Steve