The audio problem is not caused by ABM.update to 3.1 using ipk files
scan starts working but bring back old problem . on hd channels AUDIO DESCRIPTION problem come back. pressing yellow button not find any ac3 .
revert back to save 3.0 backup and sound problem solved.
so my advise . if you got old version dont update to 3.1 .
nothing new in it.
Update your image so it takes in the fix to deal with the audio descriptions. Or patch the files.