iTunes won't accept album artwork.
PLEASE don't give me the standard "Simply go to file, Get Info, and add the artwork!" or Or "Go to File >> Library >> Get Album Artwork" standard replies.
I have tried all these methods dozens of times. It simply does not retain the information. This is the case mainly with brand new albums I've just imported from store bought CDs. I read somewhere that it has something to do with iCloud or how I choose to synch my music. However it was very badly explained. I just downloaded the latest version of iTunes and updating my iPhone.
iPhone 5c, Mac OS X (10.6.8)