I was on 4.1 001 and had flashing green light to tell me a update was available.
I always use image manager to upgrade unless I have more time to play about then I will usb method.
Using image manager flash went ok but settings would not restore and in the end used usb method.
My problem is when the box was booting up from deep standby I would get spinning vix freezing in corner and the %bar would get stuck on 90% or 91%.
I would have to power down and try again and it would fail again and repeat the process and the odd time it would work. The same happened today and logs for yesterday and today attached.
At the moment box has booted up all the way and watching a FTA channel and all seems ok have not tried to shut down and power up yet.