A Twitter/Yfrog Exploit Allowed Unauthorized Postings on Rep. Weiner's Account?

The whole kerfuffle and smear campaign against Rep. Anthony Weiner (D-NY)  just gets more interesting. Cannonfire and Milowent have apparently found a way to duplicate how the image of a man's torso and penis was ostensibly sent from Weiner's Twitter account. For starters it would appear that Yfrog has no security (or is leaky) to the point that anyone can not only share images, but place images