I say the document has been altered ! ! !

http://www.thesmokinggun.com/buster/barack-obama/birth-obama-certer-movement-098513

Look at the date in the upper right hand corner the M appear to have been added at some point in a different font.

Note on the bottom right where is says "Caucasion" - - - the top of the type is missing and the background appears altered.

Just sayin  :)