Hey there, I may come a little late to know about it, but I've found there was an underannounced update for K3 back on September, it fixes the music playback feature to work almost perfectly (couldn't found how to make it display the ID3 data my mp3's had)
It has to be installed manually as the previous install (R4.13) is unable to update to the newest version.
It can be found on:
http://www.miui.com/thread-1991341-1-1.html
Hope it turns out useful for old users like me out there.
