I think we can both agree that there is nothing in a Home that would effect the software in a Re-Boot process to Boot to a Power On unless its by design. I just re-booted my 4250....it powered to ON. This issue began following the Software Upgrade.
I will admit that the 2 prior incidents when I woke-up finding all my Boxes ON may have been caused by an overnight momentary Power Outage causing all the Boxes to Re-Boot, but if the Boxes should re-boot to OFF, all 3 of mine are not.
