Still going to bat for your man, Obama. Why, if the COLB is authentic, did it appear first on DU? It did you know. After it was pointed out that it lacked a raised seal, one was photo shopped onto the same DU image. And yet it’s good enough for you. Funny, you believe anything and everything the Obama camp puts out. If Salon says it, it must be true, right?
I'm not sure I understand your question. Why would posting on DU undermine its authenticity?
After it was pointed out that it lacked a raised seal,
The raised seal wasn't visible because the original image was from a scan, and indentations on paper often don't get picked up by scanners. Later photographs taken by factcheck staff reveal a clear raised seal.
one was photo shopped onto the same DU image.
There is no proof of any photoshopping, the claims of certain anonymous bloggers with phony Ph.D.'s notwithstanding.