Hope someone can give me a solution to my problem, short of having to delete my library and have iTunes Match scan and add it again (it took 3 days and i'd really rather not!) So I signed up for iTunes Match this past weekend. I had wanted to organize my library anyway, so I removed everything and used mp3tag on all of my music to ensure it was the way I wanted it, including adding album art to every single track. I then added it all back to my library and started iTunes Match. All of my artwork was showing up on my phone until yesterday, when I added some new files before bed. I woke up this morning, fired up the music app on my iPhone 5, and now all of the album art is gone. This includes what was there yesterday and the new albums I added last night. Anyone have a fix other than starting over? TIA!