Quote:
Originally Posted by exaltedwombat
So I THINK you agree with me? :-) Don't try to be clever if you can't control which device your book will be read on?
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PDF has the same problems, you may create your book to take advantage of things in PDF 1.7, and/or you can say "best viewed in Adobe Acrobat Reader X".... doesn't stop people from trying to use an earlier version, or a completely different PDF reader (Foxit, mupdf, PDF.js, etc. etc.). You will still have a cutoff point where you say "anything below this version is just not going to work with this book".
Edit: It might be a complete pain/impossible to go from a PDF 1.7 backwards to an earlier version of PDF.