i had that same problem..
and when i tried to find out how to fix it on apples site..it said to try and reset it by holding play and menu for a while..
then it might work..
if not..try and find out how to totally reset the ipod..(i'm not sure how)..so that it deletes everything off the hard drive..
but none of this worked for mine..but mine had that picture because i dropped it..so i think i fucked it up pretty good..
I have had it since like June and it just recently started doing this....i restored it, reset it a million times and even tried calling Apple but no luck, im still not sure any more help would be appreciated....