This has happened twice now. I open itunes and connect up my ipod and get an error message:"itunes has detected an ipod in recovery mode. You must restore this ipod before it can be used with itunes". If I then eject the ipod,wait a few seconds and plug it in again,itunes detects and loads it normally. Don't really want to have to restore and re-sync everything,any suggestions as to what's causing this?