Hi
Thank you for the info. The gap is visible using ADE and Nook reader for PC. Here's the catch (frustrating). I can get this copy to Validate. But - when I create a perfect viewing copy using Mobi & Calibre, I get a long list of errors. It's a catch 22. Do I distribute a flawed copy with gaps that will validate or a perfect one that retailers won't carry because it won't validate.
I found this:
http://www.istonsoft.com
First I'm going to try your suggestion of renaming to zip and see if I can spot anything. If not, I'll try the ebook creator on that site.
I'll keep you posted.
Thank you !!