Try uploading an .epub (and not a .mobi) in KDP. A .mobi built with Calibre can have issues when you upload that ebook; try using Kindlegen (or Kindle Previewer) to build your .mobi from a previous .epub and first be sure that the .epub validates with EpubCheck.
Last edited by RbnJrg; 07-25-2014 at 12:26 PM.
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