I upgraded to 1.02.10 from 1.02.07 and I noticed some very good improvements. My mkv files with ogg audio are now supported, which is really great. Besides, I had some audio/video sync issues with other mkv files and now they play perfectly.
Thus, I think that the developers are really doing a good job by fixing bugs and issues, while introducing new features.
Now I wish that they would provide more subtitles options, but I have read that it is already planned, so it will be introduced in future firmware releases,
as well as support/hide Advanced Substation Alpha (.ass) code tags, which is also planned.