My music in my iTunes library has come from many sources over the years, and it's filled with incomplete or inaccurate or simply missing data, not to mention the fact that most of my stuff doesn't have album art associated with it.
I had hoped that as part of the 256kbps 'upgrade' functionality that iTunes would also upgrade the metadata on my songs to the metadata that they ship with the iTunes Store purchases. However, deleting and redownloading a matched song only upgrades the audio data, but keeps the metadata intact. Is there a way to upgrade the metadata as well?