I fixed all the details in all the discs, now I have the properties page open automatically when I scan so I fix each disk immediately, and just finished all my classical disks which were often without the classic layout, so without composer, or the composer in the Artist field.

I don't remember which were with wrong details, but most were old disks.

Then there are the old Hebrew and Greek discs, some Portuguese and South American, which got only "New Album" and time of tracks without text.

When I'll find new scans with the details missing, I'll post them.