[arokh]

Well, I won't say it all works for me -- I just haven't run into any issues yet, but I haven't pushed lots of different formats through it in one sitting.

Did you try playing several MKV's with HD audio?

Is there an exact sequence of events that always causes an audio failure?

I've tried pinpointing an exact sequence that causes it but it seems somewhat random. In any case, it is triggered very quickly after starting and stopping a movie with HD audio. I think 100% of the times if you try to play two different movies with HD audio, the sound will disappear.