I've recently been having minor problems with my ipod. It's very slow to respond, and, oddly, shows the wrong album cover art when I click the center button to show the "full screen" cover. I decided to just restore it to its factory settings and reload my music. But when I tried to do it, it gave me the error message "The ipod could not be restored because the firmware file is corrupt." Does anyone know how to restore or repair corrupt ipod firmware?