All of my mp3s have been tagged with previous versions of Media Center. They are set to save within the file.
This morning, MC17 inexplicably forgot the covers for just one track within for approximately 8000 albums. I searched the library for empty image files, expanded them to full albums, and saved the covers to the drive (an half hour operation). As I type this, Media Center 17 is retagging each of the files.
Why would this behaviour occur? What would cause this? How can I prevent this from happening again?