I would try to get your FW current, and put the disc on again to see. I've only had one problem disc ever, out of many many many many many many viewings, and it was Sunshine on probably the most ancient version of FW as I never updated for a while. Using a BD-30. I've watched Dark Knight twice already without a single hitch.
Regarding TrueHd tracks, I always turn off auto flagged DRC, just because I do not ever, ever want to experience terrible DRC implementation as I did with the first viewing of Iron Man.
On my Onkyo 805, I have to disable it every time. Takes a sec, since I programmed that into my URC, but the audio cuts for a split sec, which is annoying. If I doing a big movie night, it will be all set to go. This all being said, Minus, I never had any BAD experiences with T-HD tracks before when I had no clue drc was being autoflagged. Just being paranoid.