Having an occasional problem with recordings on my HR20, only when recording HD locals as supplied by DirecTV. Occasionally, when recording on NBC (WYFF-4 in Greenville), when a program begins, I will either have no audio whatsoever, or else a background audio track. For example, after the Super Bowl, I had the HR20 set to record the episode of "The Office". When playing back the next night, for about the first three minutes of the episode, we could only hear background noise. No dialogue whatsoever. This has happened previously with episodes of SVU and ER that we've recorded. Went on for 20 minutes with SVU one night a month or so ago. It seems to be confined to NBC recordings. Any thoughts? Anyone from within or outside of this market who may be reading this having the same issues?