Sort issue when using Slice as a UPnP server. On some standalone clients, e.g. my Roberts Stream 93i when the library album is selected, it shows and plays tracks in alphabetical order. It should, and I want it to, display and play in track number order. There has been a lot of discussion OpenELEC wise about this and it seems that the folks prefer to have a tight implementation rather than relax the sorting to make it work "properly" (imho).
An old kodi ticket refers: http://trac.kodi.tv/ticket/10974 and the git commit to which it refers in comment 7 is here https://github.com/xbmc/xbmc/commit/2b9fb6d663b3a01ed7560918b6e0274d8335ffe9 in file UPnP.cpp.
It does my head in playing music in high quality, knowing the track order and knowing it is wrong off the Slice. My Synology NAS UPnP serves up music in the correct (track) order.
I also use Runeaudio, but that works fine as it just uses the file structure on the hard disk, not the library.
I will be more than happy to test any fixes for this!!