Unfortunately, more and more players (my last, three-day-old, related article reporting on no less than five(!) players' doing the same) end up dropping AC-3 (and related) audio support, meaning the inability to play back the audio in a lot of videos: all AVCHD ones (camera MTS files etc.), about half of MKV's (AC-3 is very popular with MKV's, the other popular audio format being DTS), all ATSC (U.S.) digital TV broadcast recordings, a lot of AVI's etc. - as is also mentioned by THIS, RushPlayer-AC-3-drop-related post.