I received the update today, and lost my 5.1 Surround.    I spent quite a while searching for the audio setup, but couldn't find it.  So, I called Tech. Support and spent another 15 minutes on the phone as they "ran tests" on my system.  It did give me the chance to complain about the random high pitch noises the box has been making for the past few months.  End result, a Technician is coming to check this out tomorrow.  What a waste of time.  I found this thread AFTER calling Tech Support, but you would think that at least they would know what is going on.  I'm sure they have been receiving PLENTY of complaints about the loss of 5.1 after the update.

Date Update Rcvd:  07/08/09

City:  San Diego

Date 5.1 Restored:  ?????

I'm not very happy right now.