I'm seeing the same thing - I "fixed" it by setting the output to 480i and then setting it again to 1080i. I haven't noticed if it came back on yet.
One other quirk- when I go to the system information page, it does not have the DVR name even though I set it on tivo.com.
One other quirk- when I go to the system information page, it does not have the DVR name even though I set it on tivo.com.