Comment 6 for bug 92967

Amarok can't store the album images inline because of the license from Amazon (where it gets the cover art from)...the art must be refetched/refreshed after a certain number of days (which I believe is generally done automatically). Storing the images in the file would make it near impossible to provide any certainty that we were complying with the license.

I'm not sure where iTunes gets its images from, but I imagine it has to do with a music store that it has access to and somewhat controls the rights of...

That being said, I can't help you as I don't have an iPod so can't test things out; perhaps another developer can, or you can hack at the code yourself and submit a patch :-)