What result did you get when YOU ran EpubCheck before finalising your book? Passing that, as well as the Sigil internal checker, is essential.
In this case, I think you used header styles in the chapter of your book, included them in the auto-generated TOC but then messed with them, deleting some from the chapters.
I'm surprised the Sigil checker didn't pick this up though. Want to try checking your final epub file in Sigil again?
Last edited by exaltedwombat; 07-28-2013 at 03:54 PM.
|