This is shaping up to be a problem that will be hard to track down.
For some discs, using MakeMKV (paid for and registered, BTW) to play a Blu-Ray disc on Kodi 15.0 produces broken video on my display (http://forum.kodi.tv/showthread.php?tid=230514).
Some discs don't exhibit the problem (Alien and Avatar, for instance), but others do (The Homesman, The Fifth Element, for instance).
I would be inclined to believe the problem is all due to Kodi if it weren't for one observation: playing discs shows the problem, playing from ripped mkv files doesn't.
So I guess here is my question for MakeMKV folks: what could possibly trip up Kodi when playing a Blu-Ray disc (libmmbd.dylib) but not when playing a ripped mkv file from that disc?
dgktkr