I had a problem getting my hdmi audio working, but I now have that working great.
My new problem is that now mythmusic isn't working. When I go into music, the play list comes up and it looks as if its about to start playing but never does.
If I go into "setup/general/audio system" and change the "Audio output device" from "ALSA:hdmi" to "ALSA:default then mythmusic plays just fine.
Of course this mean I lose my HDMI, any ideas?