This is probably a common problem, and I wonder what is the cause: I have a H/K AVR 8000 receiver and a Panasonic RP 82 DVD player. When watching DVD's (particularly Shrek is where I've noticed it) in Dolby Digital 5.1 format, I sometimes lose the sound from the FL, C and FR speakers. I can hear soft voices of some characters, but not all. If I switch the audio format to Logic 7 (or some other format), I once again hear the sound of all characters, but then it comes from all speakers. Is this a problem with the receiver, the DVD player or hte DVD itself? Thanks in advance for any help.