I have two 622's, about 1 1/2 years difference in age, both running L5.12. Both have the duplicate SD channels locked out so only the HD channel will show in the guide. When DISH activated the extra Olympic HD channels they both showed up on the newer 622. Yesterday I noticed they were not showing on the old one. Today I checked "locked channels" and found they were locked on the older 622. I didn't lock them so apparently they locked automatically when DISH activated them. Very weird that it only happened on one of the 622's. Guess I'll have to keep watching DBSTalk for announcements of new HD channels to be sure I don't miss something.