My 622 just did something it's never done; while watching a show on DVR around 10:45am, it put up a message on the screen telling me it needed to shut down to check for updates, and offered me the option to let it shut down, or cancel. I went ahead and let it shut down, and now it's rebooting. Wierd, I've never had it do that during the day when I'm watching. I have it set to do it's daily updates like at 4am, and it was off all night. Anyone have any idea why it did this?