That is what I would think they might try...course they have an obvious Fake on the WebSite....they will have some spinning to do to cover that.
BARACK HUSSEIN OBAMA (PROBABLY) BORN BARRY DUNHAM WHOSE ADOPTED NAME IS BARRY SOETORO - WILL THE REAL WHAT'S-YOUR-NAME-WHO-EVER-YOU-ARE PLEASE STAND UP!? (ps. WE'LL ALL LET YOU EAT YOUR WAFFLE WHEN WE KNOW WHO YOU ARE!)
They have a low-res illustration there, not really legible, but just implying that the image is of a document that proves the textual information of the page is true (the larger image is scaled down for display by the html code). That's easily dismissed as "it's just an illustration...it's what the real one looks like, anyway..." And they never claim that is his birth certificate--they only imply it.
Unlike the Kos one, it hasn't been through multiple iterations to add a seal, etc. They can make a disingenuous but seemingly reasonable claim that they were not saying that was his birth certificate, but the focus was on the words saying he was born in Hawaii.
(BTW, Red Steel, note that I wasn't making it up when I pointed out that I could see a seal on the document that others claimed had no seal--it's right where I pointed it out. :-)