Back up your iTunes library: File-->Library-->Back up to Disk, and
Export Playlist
Move and rename the original iTunes library file [database]. Then
reimport your music. The easiest way to do this is to drag and drop the
iTunes music folder into the Music library in the program. Don't do all
of the 11000+ files at a time. Try a few hundred at a time, then work up
to 1000 or more. Or you can do it in the File-->Add to Library dialog box.
You shouldn't see the .DS_Store file. It's supposed to be invisible. It
stores metadata about contents of a folder. Are you using any of the
utilities that make invisible files visible? [OnyX, TinkerTool, etc.;
playing with the Terminal] If you are, those utilities can also create
mischief in the Finder if you don't know exactly what they're supposed
to be doing [RTFM]. Did you restore your HD recently?
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