Hi Ken,I ran your question by the engineering department, their response is posted below:"Lulu currently uses EpubCheck 1.2. and this only supports EPUB2.EpubCheck 3.0 (which supports EPUB3) is in Beta 4 and is being recommended for validation. http://code.google.com/p/epubcheck/Use of this validation tool is under investigation. If the investigation and testing is successfulwe will schedule the work and upgrade. Thanks for your patience."Kind Regards,David K & the Lulu site engineers
Now we are in may 2014, Are we still waiting for EPUB3 ?
Any word on this? It's 2015 and EPUB3 is still causing errors.
Boy you aren't kidding! Created a fixed layout epub in Adobe inDesign and lulu gave me a stack of errors like I've never seen. I think I'll pull my books from lulu and go another route.
Lulu deployed EPUB validation v3.0.1 in November 2013.
Of course there is a difference between the validation version and EPUB3 formatted eBooks. Unfortunately, eBooks created in EPUB3 format are not yet widely accepted by online retailers. Even though there are limited retail options for EPUB3 books, we are looking at what is required to create, review, and distribute eBooks in this format.
I hope that answer addresses your concerns.