http://www.henrymakow.com/birth_certificate_pixels_dont.html
One little birth certificate glitch no one seems to have caught on about is the type set. The "ni" letters of the hospital name gives away another clue to this document fraud.
In the old days before modern computers there was truly mono-space type as this was all the typewriter could technically perform. The "n" key and "i" key were always equal distant. With the modern PC even spacing of not only words but letters came into being so that fully justified left and right margins were possible.
Most people probably don't understand the cut and paste of signature pixels you're showing but thought I'd pass along the reasoning.
The dark signature without supporting lighter pixels is an indication of editing. Editing away lighter pixels from a scanned signature may have been done to hide a different paper texture or coloration of the original document. In a scanned graphic image there should always be lighter pixels to complete a smooth image from light to darker areas of a graphic image.
http://market-ticker.org/akcs-www?post=185202
There are others who have noted a number of other problems with the document presented. Among them are that there are no apparent tab stops used on the Obama "birth certificate." 1961 was the day of the typewriter, and nobody hand-centered things like that. Production typists used tab stops and if you look at other, known-authentic birth certificates from the time, you'll note that they're tab-aligned. Obama's is not. Remember Dan Rather and his little forgery? 20-something idiots in the White House IT department have never used an actual typewriter in their life. 40-something bloggers and their girlfriends (and "Batgirl" deserves recognition for the catch on this one) most certainly did during our school and college years, and we remember how they worked too. Nobody ever manually centered or manually-aligned production documents in a typewriter.