epub to itunes research

why a .epub from inDesign won’t upload to itunes producer without a problems is beyond me. Links to try and debug it:

all .epub’s to the itunes producer need to pass epubcheck 1.0.5: http://www.threepress.org/document/epub-validate
Tip #4: Even though the files properly validate with an EpubCheck site and validate with iTunes Producer, they’re not being tested for everything that Apple’s system might require. Validation doesn’t necessarily mean valid.

list of errors: http://code.google.com/p/epubcheck/wiki/Errors

http://www.zdnet.com/blog/government/six-tips-for-getting-apples-ibooks-to-accept-your-epub-file/9054?p=9054&pg=2&tag=mantle_skin;content

link to downloadable examples of epubs that made it into the apple store: http://usspi.org/download/

Some one’s workflow (second comment): http://www.kindleboards.com/index.php/topic,26225.20/wap2.html