Quote:
Originally Posted by jackie_w
Would I be right in thinking this was an EPUB3 rather than an EPUB2? The cover page you added via calibre probably contained an image wrapped in an <svg> tag.
For EPUB3s, EpubCheck will show an error if the OPF manifest item for an XHTML file containing an <svg> tag doesn't have a properties="svg" attribute e.g.
Code:
<item href="text/titlepage.xhtml" id="titlepage" media-type="application/xhtml+xml" properties="svg"/>
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Yes, it is an ePub3 file, and the image was indeed wrapped in an svg tag!
But I assume I would have to open the file as an OPF (whatever that means

) in order to edit it, and I've no idea how to do that.
Anyway, the problem is solved, and my ebook finally looks exactly like it should.
So I'll say

everybody for now!