I had made a misclick when tagging a song's album art, I don't know what it was, but a lot of songs got highlighted. I hit cancel, but it seems like some kind of change got made. I found a song in my library with that new album art that shouldn't have it. I can't quite find any search feature that will help me track down songs with that album art, so I think the ability to sort by album art would be nice. This way I could find the song with the artwork and hit the column sort button and see what else has it.
The "Inconsistent Album Artwork" feature does not cover this.