My PIN entry keypad has disappeared and I can no longer access the device (Nexus 7). Powering off does not clear the problem. Any experience of this? TIA
UPDATE: Booting into recovery mode sorted out the problem.
I then uninstalled the most recent installed apps, which were:
Autumn leaves wallpaper
These may not be the cause of the problem, but its gone now.
Glad you got it sorted and ta muchly for posting the solution!