so far my experience with this beta firmware :
1-bigger subtitle font is the best and is feature of the firmware for me
2-not just with mkv playback via network shares has bug but also browsing the media server has been very slow and irritating so I guess u guys should work on the network issues more
3-disappointed as the mp4 issue has not been fixed yet but bigger subtitles makes me feel better
making this a beta is a good idea in my opinion as the network issues are for real!!