Hmm. All my art is currently using the external file method I detailed earlier.

As your bug suggests, all of the files in my ~/.cache/media-art directory start with "album-7215ee9c7d9dc229d2921a40e899ec5f-".

If I try your step 6 with a similar situation to yours ("1 album, 1 song", but with my own file and art), I still get a thumbnail on the right.

So, I agree that it's doing something strange in the media-art directory, but I can't reproduce your lack of thumbnail. I'll try again later, at home, with your files.

Edit: Okay, tried it with your files. I downloaded your two files into ~/MyDocs/tmp, then moved the directory into ~/MyDocs/.sounds, and the art shows up. So I think there is another bug -- the art has to be indexed by tracker (it must setup something somewhere) rather than just being put into the media-art directory before it will show up in the media player.

-jkq