I think that the red font is telling you that the author-sort field for this book does not agree with the author-sort value currently stored for that author. If you go into the list of Authors and find the author in question I suspect that you will find that the author-sort field set there is not correct. Fixing it there and telling Calibre to apply the change to all books by this author will then fix the problem.
Last edited by itimpi; 11-12-2010 at 08:55 AM.
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