"Yes it could be a hanky. But it falls kind of heavy, and stays uniform in it's [sic] fold."

"Plus it is flat.  I have never seen a man's hanky be so uniform and flat coming from a front pant's pocket.  Back pocket, yes, breast pocket in a jacket, yes.. but not the front pant pocket."

Daily Kos, theorizing that Romney had a "cheat sheet" during the debate, during which no notes were permitted.

It was a hanky. So Obama's would-be helpers — attempting to besmirch Romney — succeeded only calling attention, once again, to what nearly everybody thought they saw on Thursday: Romney's superior preparation, ability to think on his feet, and eloquence.

ADDED: Gawker gives the history of debate conspiracy theories, and in one of them I — of all people — am the conspiracy theorist.