You keep saying he made a document available. He did no such thing, he emailed an image purporting to be of the short form birth certificate, aka the Certification of Live Birth. It's hardly the same thing. Those images showed no raised seal, even though other scanned images of the same type of document, from Hawaii, clearly show the seal, which is actually indented rather than raised when viewing the front of the document.
Only fact check purports to have seen the paper document, upon which the raised seal has magically appeared, (after people noted it's absence). They purported to have photographed the document, but the photos show very poor, maybe deliberately poor, composition, lighting, and so forth. And the seal, invisible before, now is highly visible, but still not very authentic looking.
Indentions in the document are hard to pick up by scanners since they usually don't change the color or shading of a document very much. Better scanners will pick them up, others will not. Photos of the document, however, clearly pick it up.
Only fact check purports to have seen the paper document, upon which the raised seal has magically appeared, (after people noted it's absence). They purported to have photographed the document, but the photos show very poor, maybe deliberately poor, composition, lighting, and so forth.
That's pure bull. The photos look fine to me. I'll let any lurkers judge for themselves:
http://www.factcheck.org/elections-2008/born_in_the_usa.html