iPod Touch Passcode doesn't work after restore from backup My son entered too many incorrect passcodes on my iPod Touch and apparently forced it to wipe my iPod clean.  Sadly, this has happened before.  I connected to iTunes and restored from my latest backup and then sync'd.  When I went to unlock my iPod, instead of being presented with the usual numeric keypad, I was given the full qwerty keyboard.  This was alarming, but I switched to number mode and entered my numeric passcode.  I was told "Wrong Passcode, try again".

What has happened?  Why won't my passcode work, and where did this qwerty keyboard come from?  And most importantly, how do I fix this?
The solution to my problem was rather simple, though I still don't understand it:

Reboot.

My battery drained completely, and when it came back on after plugging it in it presented the expected numeric keypad and accepted my passcode.  It seems rebooting was all I needed to get back to normal.

It doesn't make sense to my why it happened that way.  If you have an explanation, I'll happily accept your answer.