I linked a pro-birther site that has an article with statements like:
- "While there may be other challenges to the document’s authenticity that bear further scrutiny, it appears that the “layer argument” can be easily explained."
- "Graphic artists who addressed the issue on blogs and Web forums point out that the format in which Obama’s document was released, Portable Document Format, or PDF, is composed of multiple images.
Tests on other PDF images produce an effect similar to the multiple layers extracted from Obama’s document."
- "The PDF viewer, Cartan explained, “then takes the different objects, decompresses them, and reproduces a fairly accurate copy of the original (much bigger) image again.”
“None of this is an indication of forgery,” Cartan said. “They just wanted to save a few bucks for the bandwidth, it seems.”"
- "Nathan Goulding, National Review’s chief technology officer, confirmed that “scanning an image, converting it to a PDF, optimizing that PDF, and then opening it up in Illustrator, does in fact create layers similar to what is seen in the birth certificate PDF. You can try it yourself at home.”"