@JSWolf : ok, soooo, according to IDPF, epub 3 should be the standard, but most of the e-reader tablets stick to epub 2, that's right ? once again communication is really weird in between geeks who create new standards and factories who create support materials.
Following your advice I downgraded one of my ebook to epub 2 and it pass the Epub check with no error :-( ... sound like a good news, but I really loved epub 3 ... anyway thanks a lot everyone, it's great that this problem got solved in less than 24hours !!! amazing community out there !
I'll rework all my ebooks and create both epub 2 and 3 versions (v2 for Smashwords, v3 for my own distribution channel)
best wishes for the new year and happy Xmas / Hanoucca / or happy whatever-you-believe-in-and-is-an-opportunity-for-a-end-of-year-familly-party :-)
