Originally Posted by DHahn
In the process of trying to fix this issue I re-coded my cover.xhtml file and gave it a different name... started from completely scratch with it as a last ditch effort.
The cover is attached above as a_cover.rtf (silly, I know, but it seems we can't attach xhtml files in this forum). It is also declared as such in the manifest.
A cover must be an image. rtf is not an image format.