******* Forgive me, but I reposted this thread in this forum since I beleive I originally posted in the wrong location. ******* I got my HR20-100s unit installed yesterday. Everything seemed to be going fine until I hooked up my optical connection to my B&K Reference 30 Audio Preamp. Selecting recordings that I made last night (i.e. Discovery HD, HBO, etc.) or switching live channels in the Guide that have Dolby Digital audio streams will kill the DD 5.1 audio under the following conditions: Pausing content and then pressing Play Rewinding and then pressing Play FF and then pressing Play Changing channels The only way I have been able to remedy the situation is by selecting a different source on my A/V Preamp and then switching back to the source input for the HR20 -EVERY TIME!! . There is no way I can deal with this each time I FF, Rew, Pause, etc. Changing channels from one that has DD to one that does not DOES bring back audio. Resetting, rebooting, etc. does not sovle the issue. I have the latest firmware revision on the box after the installer forced the update yesterday. Its as if the A/V Preamp is not receving the proper signal that there is DD available. I have read some other posts about similar issues, but could not find updated information. Any clues or ways that I might try to remedy?