Hello,
I just updated Calibre to 7.24, and I've noticed than all books having an ISBN identifier in the Edit metadata window now display some sort of *phantom* identifier named "Kobo Metadata" appearing in the Book Details panel and duplicating the ISBN (but not appearing in the metadata window, neither in the Ids list navigator). When I click on it, it sends the isbn number to the Kobo (French) site (resulting in an error in Kobo site, although it's from a french book ISBN).
Deleting the Kobo Metadata plugin 1.10.0, and restarting Calibre fixed the problem.
So I guess there must be some kind of incompatibility bug between Kobo Metadata 1.10.0 and Calibre 7.24.
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