Or you could go in to Time Machine......delete all backups of ~/Music/iTunes/iTunes Music and then have it backup everything fresh.
Only do that if you don't need the incremental TM backups of your music files.
-Kevin
I've been changing the naming conventions for all my TV Shows, as such TM has brand new copies of these byte-sized changes, and that drive has 60 GB less space for about 10kB of changes.
Anywho, if my internal laptop drive bunks out on me while TM does the fresh backup, someone is gonna burn