Quote:
Originally Posted by jgoguen
I believe that would put the modified book into your library, not sure how else it could have happened. Maybe you added a book that had already been modified.
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Somehow I've copied the books back with Calibre, but I cant remember when and how, and obviously it was unintentional. If I try to do it ("Add books to your Calibre library from the connected device") only one unrecognizable and unreadable file is transferred.
Anyway, a few hours of RegEx search&replace solved this :-). This was another lesson of the importance of backing up...