|
Hi Nick,
I'm sure it is related to the internal structure of the KePub.
Maybe the first time you sent the book you where using an older version of Calibre and the plugin, and the plug-in didn't identified the cover in a way that Kobo could recognize the cover.
When you deleted the book from Kobo, the data related to the book, including the cover, was deleted from the database, and the next time you sent the book you were using a newer version of Calibre and the plug-in, and the cover was correctly identified.
I manually edit the Metadata in my books when I add them to Calibre to ensure that things like the cover are correctly identified, but I have found that some older books that I bought before having my first Kobo don't show the cover. These books don't have a specific property for the cover in the Metadata, I began adding it because of the cover problem, but I don't know if it's still necessary, maybe newer versions of Calibre and the plug-in have solved this problem, I haven't tried to add an old book for some time.
|