Here is a possibly related issue that I am having:
Lately several of my albums on iTunes have stopped playing, and the artwork has disappeared. The album info is still in my iTunes library, so at first I thought the album artwork was just getting zapped. But if I click on play on any song in these albums, simply nothing happens. It just will not play.
I dragged some of the files from iTunes onto the desktop, and tried playing them on another audio player, but nothing happened. So apparently the files are somehow getting damaged.
The files are still visible in my library (I keep my iTunes library on an external hard drive), but the icon preview next the the song does not show the cover art, as it does on unaffected albums.
The only thing these albums have in common, strangely, is that the artists all start with A (Andre Bourgeois, Andres Segovia, Anouar Brahem, Anthony Braxton, and Antonio Carlos Jobim). The files are all MPEG-4 audio files, except for one song, which is an MP3.
All the tracks were burned from store bought CDs, and played fine on iTunes for months, until one day they didn't.
Now occasionally I click on an album in iTunes, and the artwork just disappears, and the album no longer plays. Other albums play without problem, and display the correct artwork.
I am using the most current version of iTunes, my software is up to date, and I have tried repairing the permissions on my hard drive.
Can someone shed any light on this bizarre and perplexing issue, before my iTunes library disappears into the Twilight Zone? Thanks!