622 Recv. I have had this unit for about a week. Have noticed local HD chan. sometimes have audio sync problems, NBC is worst. Switched over to CBS, sync ok, switched back to NBC, problem still there. Checked NBC SD, no problem, switched back to NBC HD, sync problem remains. I have read some threads where folks are compaining about sync trouble with the 622, but this seems to be more a Dish system problem. Looking for advice and symtoms involving the 622.