I'm having an issue with all shows recorded via OTA with the AM21. Curious if it's just me. Randomly, throughout the entire show, the audio will break up and/or cut out and the picture will freeze for a second. This does not happen when I view a show live via OTA. Signal strengths are all good, upper 80's to low 90's. It happens on everything recorded OTA. My DVR is an HR21-700 using the latest firmware release from July 2008.