I'm not sure if this is where this should go, but it seemed to be the most appropriate forum - if this is the wrong place, please move it.
I've got an enormous iTunes library, and a lot of the stuff is mislabeled. Album titles missing, duplicate artists, artwork missing, track numbers before song titles, etc. I've seen a few programs out there which will automatically fix things like this, but I'm not sure which are good and which aren't. I'm running OS X 10.5, if that makes a difference.
And no, before anyone says anything, I won't switch media players. Using my iPod as a remote to control the playlist is a must have, and the integration between iTunes and the rest of my computer is too seamless to give up.