I just updated to iTunes 10 and it took my entire library and saved all songs under the same artist and genre, who was first in the list if you sort by artist. No idea how this happened, but it happened. Now how do I fix this without manually correcting every song? I tried several backups in Time Machine and not of them corrected the issue. My only other idea, is I have an iPod Classic when I do a complete sync too. I had a program at one time that would take the songs off the iPod and put them into the library. Could I delete the library and take everything from iPod and start over that way? Just double checking so I don't have to correct manually! Couldn't find an UNDO feature in iTunes..... Thank you!