Quote:
Originally Posted by KevinH
It should have changed when we moved away from requiring ncx in epub3. At least that was the plan!
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That's what I thought, too!

But 0.9.16 through 0.9.18 all seem to sync the optional ncx (file renames anyway--you still need to regenerate the ncx after additions/deletions/splits/merges, etc...) after it's added to an EPUB3 (and 0.9.16 was the first version where the ncx wasn't enforced on EPUB3s).
I understand if it was too difficult to maintain that syncing after the massive overhaul that was 0.9.991, but I'd hate to think we accidentally "turned off" something that would still work (even if it wasn't entirely necessary) if we but let it.
But this isn't critical, either. There are many things that make it necessary to regenerate the optional ncx after the nav changes anyway.