Originally Posted by Craigbob
...They also suggested that I turn off Dolby Digital to avoid the Audio dropouts...
I'm not sure how that could help. Audio on OTA channels is AC-3 format, which is the same as DD. Correct me if I'm wrong but I think the only thing "turning off" DD on the HR10 accomplishes is it defaults the downmixing to 2.0. Regardless, the same DD audio stream is always recorded by default. If you were actually turning off the recording of the AC-3 stream, there would be no other audio available, as 2.0 audio is typically downmixed from 5.1 when available, and passed through as DD 2.0 when 2.0 is the source.
Others who have followed this advice report no improvement. I have had DD "off" for weeks, and I still get the dropouts on occasion.