Although we have written several times before, the problem still remains that AAC 5.1 audio is supplied as PCM 2.0 when watching a movie. http://forum.zidoo.tv/index.php?threads/aac-passtrough-problem.5865/ The problem hasn't been solved since version 1.4.12. As far as I understand, the problem is that it can not do the "DD5.1 Audio Transcoding" operation. A friend also reported the Bug number 44.221.474.
Had the same problem, caused by my lightberry hdmi converter box, do you have the same problem when connecting directly to receiver ?