HR24-700: Have audio drop outs when watching live TV. If dolby digital is enabled, it will just stop the audio for anywhere from 5 seconds to a minute, and then come back on. With dolby not enabled, it just pops off audio for less than a second. This only happens with MSNBC, no other channels I am aware of. Also, not video breakup, and hitting replay the drop out is not there at the same spot. I would suspect a problem with the receiver or cables, except for the fact its only happening on this one channel. Any suggestions on what to check for?