Well, I think I'll change ANT inputs to analogue and see if there's any ghosting that would indicate signal reflections on the only HD channel (VHF) I can't receive. I'm using rabbit ears (VHF/UHF) and live within 8 miles and <30° of all towers.
I'm not sure why only one (CBS) VHF station would have refection issues when the others don't. I have a roof antenna that I haven't mounted yet due to severe cold and snow. Other than that we've been really pleased with the recent ($199) VIP622 receiver upgrade. We use it in our basement theater on a 106" 16:9 screen with a Panasonic AX100U pj.
I was disappointed to read here that the hdmi output only supports 2 channel audio, seems like too nice a receiver to scrimp on the hdmi decoder chip though.
Thanks,
Ward