[Gal from the South]

Originally Posted by wrecking ball

actual experts say differently:

Genuine, World-Class Computer Expert Evaluates Obama’s Birth Certificate PDF

http://www.ecompconsultants.com/news/Obama-report.pdf

Oops... I guess you didn't read the report. See below for excerpts from the second link. The first link wouldn't open.

Here is the last paragraph:

All of the modifications to the PDF document that can be identified are consistent with someone enhancing the legibility of the document. It is possible that in addition to enhancing the legibility of the document that the content of the document was also changed. There is no specific evidence of how or why that content would have been changed, but the evidence clearly indicates that the document was changed.

Also in the report:
The meta data indicates that some parts of the file are TIFF images and some parts of the file are PNG.
These are two common file formats. TIFF images are usually produced by scanning softwarebused with scanner devices. PNG is a newer format used by graphics programs that store in graphics databa more efficient format producing smaller files than TIFF files.

The two image types appearing in the meta data is consistent with the fact that the PDF document contains layers where small chunks of image are overlaid on the larger background image containing the form and security paper background. What caused those layers to exist is unknown. One commenter at a prominent website said that the layers were caused by “optimizing the PDF.” I know of no PDF optimization process that creates layers in the output PDF file.