I suspect this may be related to metadata. I found out that if I delete the Amazon identifier from an ebook using calibre and convert it to another format, if I add a new copy of this converted file to calibre's library it preserves the original file's metadata. That is, calibre, apparently, isn't actually changing the books' metadata.
So, maybe the Kindle's software is replacing the book covers because the Amazon identifier is still embedded into the file.
|