iPod iPod suddenly starts playing after being inactive for some time

[yequene]

After using my iPod I press the play/pause button and keep it pressed for some seconds to turn the iPod off.
Some hours later -I don't know exactly how long since this usually occurs overnight- the iPod starts playing music!!!

Am I missing something when turning the iPod off?
Does someone have the same problem?
If so, have you been able to fix it?

 

[Hudgie]

Have you checked the alarm clock?