Revealing my ignorance here.... Here's a question for those with the color ipods..I bought my wife a new ipod last year (4th generation, color screen). We've downloaded various album art files using tools I've found suggested here. However, when the artwork shows up on her iPod (when she plays a song), it doesn't fill the screen. Is this a resolution issue, a settings issue, or the way the iPod is supposed to work. Thanks!