Hi,
With the new drivers, the audio issue on playing mkv files is now solved.
However I observed *.m2ts video format still doesn't play..this is probably on of the few format that this box doesn't play (others being the propriety *.rm formats which we can't do much about anyways).
Request the experts to fix this one to make the ET9x00 the best all round multi-media player (in addition to its top position in sat-boxes !!)
Merry x-mas and a very happy new year to all !!