Mother in law just picked one of these up (I'm setting it up, etc) and it seems to have an issue (or 2).
When I power it down while a usb, or power, cable is connected, it just boots straight back up.
When it is powered off and I connect a power cable, or connect usb to pc to power it, it boots up. No plain black battery charging screen.
Any ideas? .
btw. It's still fully stock rom, but with unlocked bootloader and rooted.
Last time I saw behaviour like this was with a crappy, cheap Chinese tablet.