[Geargrinder]

I've been trying to solve the following issues for a few hours now and it's driving me crazy!

I uploaded a series of books to my reader yesterday. Today, after some help with Calibre I wanted to copy the books to my reader again so the titles are shown differently.

since I'm uploading the series again I decided I might as well change the covers of the books so they all match.

Everything fine so far.
BUT. Of the 10 books of the series there is 1 book that will not show the updated cover. It keeps displaying the old cover no matter what I do.

I've deleted the .kobo.images (or however it's called) folder from the reader.
I noticed the old cover was put at the end of the book, so I edited the book and deleted the image as well as the last page.
I've got another version of the book and edited the metadata to be the same and tried uploading that one.

No matter what I do, the kobo will display the old cover of that one particular book.