From ABC News:

According to the webblog TechCrunch, which tracks new Internet products and sites, McCain’s MySpace page profile included a pranked letter on Tuesday morning that read: “Dear Supporters, Today I announce that I have reversed my position and come out in full support of gay marriage … particularly marriage between two passionate females.”

On his own website, the co-founder of Newsvine, Mike Davidson, claimed responsibility for pulling the prank.

Davidson claims that he designed the MySpace template that McCain is using and usually lets anyone use it for free as long as they give attribution.

However, apparently McCain didn’t give him credit and Davidson sought retribution.

“I think the idea of politicians setting up MySpace pages and pretending to actually use them is a bit disingenuous, so I figured it was time to play a little prank on Johnny Mac,” writes Davidson.

Also see techPresident for more.