Dennis, I'm adding to this thread as I think I have encountered another issue with maintaining libraries.

I'm not sure but I think my library was originally created by scanning the PC that hosts Mezzmo. At some point in time I must have added *some* of the PC's folders under the top level Music, Videa and Photo playlists. Recently, I copied all the media files on the mezzmo PC to my NAS and added the NAS folder to the Library root. I then deleted any folder references for the mezzmo PC. Finally I ran both playlist and library maintenance. Unforatunately mezzmo still has all mezzmo PC files listed in its playlists. I had to go into top level playlists and manually delete all references to the mezzmo PC files.

Is this what's supposed to happen?
Is there an easy way to remove files that are added to the library through a scan?

Thanks