I had a similar problem, and found a workaround. All I did was completely remove the three folders in ~/.thumbnails: fail, large and normal. Nautilus then re-reads the metadata and assigns new icons to all the files on the computer. I hope this helps.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/914313 Title: Pictures in tags of audio files, which act as thumbnails, are NOT shown for ALL files in same directory To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/totem/+bug/914313/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs