Go through the .mobi version and make sure it follows the guidelines:
http://kindlegen.s3.amazonaws.com/AmazonKindlePublishingGuidelines.pdf
This is a checklist from the end of the above guidelines:
- Open the book for the first time or go to the cover page.
- Go to the table of contents.
- Go to any location in the book (reflowable ebooks only).
- Go back to the first page and flip through every page of the book.
Go through the .mobi version and make sure it follows the guidelines:
http://kindlegen.s3.amazonaws.com/AmazonKindlePublishingGuidelines.pdf
This is a checklist from the end of the above guidelines: