Originally Posted by _savage
That is what I've been doing so far. The .epub files pass epubcheck validation for version 2, and my assumption was that this is good enough to build a fully functioning .mobi file for Kindle from it. I guess that doesn't hold :-)
be no problems with a validated ePub (v2) becoming a fully functioning MOBI file using Kindlegen. Whether or not it will look identical to the original ePub in every way is, of course, another story.