Okay first thing I noticed, is that when watching a movie with a mono soundtrack (the original version of Blazing Saddles, in this case) the display that shows how many channels are in the signal shows ".0" instead of 1.0 like it should.
Secondly, the only two modes available are Dolby Digital, which plays audio out of just the center speaker (as intended), and stereo. I assume this is normal, but I just wanted to make sure that no other options like Pro Logic should work.
I should note that I haven't updated to the newest beta firmware yet, but I do have the version with the first no-audio fix flashed.