On friday 9th March my new iPod came and i have been very happy with it for 1 of the days i have had it. On saturday when i plugged it in, it came up with an error saying "an unknown error (-48) has occured, and your iPod can't update. This only happened sometimes, so i didn't worry about it. And then yesturday it decided to select itself to manage songs automatically, eventhough i hadn't selected this. if you try and change this you have to erase and sync, so i did this yesturday and happily waited and hour while it updated all 30GB of my data. But it selected to manage manually again today. What can i do to stop it doing this? Something else i have noticed is that some of my older music is not actually on the ipod, just the file names, but they play on iTunes. any ideas about that?