Contour freezes when changing channels

We do.

As i_cut_the_cord wrote (below):
Exactly as you describe - it happens while changing channels. You will hear the sound from the new channel, but see a frozen picture from the channel you are changing from. You then have to reset the box.

This is exactly what we are seeing. About every 3 days or so. I would add that all the box menus also function perfectly.

It also seemed to happen when the box was waking from power-down, so we've disabled power-down.