I'm pissed at my Motorola DCH3416.
I realized that it wasn't putting out as good a picture over HDMI as my computer (MythTV) did over HDMI on the same programming. In particular, the black level looked too high, and things looked washed out---basically like the brightness was turned up on the output. And YES, I checked to make sure my TV settings were the same on both HDMI inputs. And to double-check, I plugged the DVR into HDMI1 and the computer into HDMI2 /and/ vice-versa, problem persisted.
To get my TV's "true black" on the computer's HDMI out, the TV brightness setting of ~52 or lower worked. With the DCH3416 HDMI out, the TV brightness needed to be down around 30 or 40.
This confused me, so I hooked up the Comcast box's Component cables, and the black level and colors were correct! For some reason, the component output displays correctly, but the HDMI output acts like the brightness has been turned up.
Could someone else check to see if their box has this strange behavior? Maybe I just need to swap out my box...?