Well, I can't help you with your issue but maybe you can help me with mine. What program opened the content.opf file to change the “dc:identifier”? I have tried Dreamweaver, Text Wrangler, Calibre…

I assume when changing this, it's a simple line of code in this file and I can place the ISBN number here. However, I”m new with code so if there is anything tricky, please elaborate.

This is my first PROBONO epublication and it has been a nightmare of a learning curve.