Originally Posted by JSWolf
Fixed layout is not ePub. It's something else. So we don't count that at all. B&N's ePub is box standard ePub just with a different flavor of DRM. Everyone else (except iBooks) uses standard Adobe Adept DRM with standard ePub. There are more readers, more programs, more apps that handle ePub. eBooks don't start and end with the USA. The world is into eBooks and ePub is the mot used reflowable format out there (at present).
Nope. You're completely wrong about the fixed layout not counting as Epub. The IDPF calls it that and so do the 3 companies. And do you know what? They all meet the IDPF Epub spec.
There's simply no way for you to get around the fact that your beloved "industry standard" Epub has internal incompatibilities. So long as that remains true the Kindle format can't be faulted for not being compatible.
Also, you ignored my point about the new iBooks format, which is yet another form of Epub.