first of all, its 2.2.1, jailbroken. I am having a trouble with my sleep mode. the ipod 's sleep mode has worked fine all day, but now, since around 4:30, i was on a flight back from LA to the bay area, and the ipod's sleep mode stopped working, basically, it will play music and such, with screen off, but once it's off, the screen doesnt turn back on without the computer. when it is hooked up to the computer, it will turn on and off into sleep mode and such just fine. any idea why this only happens without the computer? and also, why is it that sometimes the ipod will go to sleep, and then when i click the home/wake button, it will take up to a minute to turn on the screen again? thanks ahead of time!