About 3 the is morning (not the maintenance time set for either of my machines). I was wakened when the ViP622 in my bedroom started not one but several reboots. After one of them I did managed to check the software level and it is now at L4.49, which it wasn't at last evening. I turned off the power to it for now to allow for sleep.
I went to check my other ViP622 (which has a high serial number), and it too was rebooting and now has L4.449. I did pull the power and let this one reboot, and have let it run while I posted this. At the moment it appears to have stopped rebooting. I'll check in the morning to see if the one in the bedroom is now also has stopped. Meanwhile I'm going back to go back to sleep.
I too have L449 now. My 622 in bedroom rebooted 4 or 5 times that I turnd on the TV to see what was going on. After the ugrade message and next reboot and acquiring satellites all worked fine