Last night I ordered a 24p PPV, first 24p I've ever ordered. Picture was great, played back via HDMI through my AV receiver from my HR23-700. The receiver played the audio through my 5.1 speakers, and did a straight unprocessed video signal pass-through via HDMI to my LCD. What I found odd, though, was audio sync drifted. It would be dead on, and slowly drift to a very noticeable lag, then drift back closer to correct. I could periodically correct it manually by pausing the movie, but it would always drift, always backwards. I can correct an audio delay via my receiver, but this has only occurred via this 24p PPV, does not happen via BluRay, or via normal non-PPV DirecTV viewing. Is this a known issue, or did I just get unlucky last night?