Josh Gross is all over the latest:

After reportedly deciding to shelve a complaint against UFC welterweight champion Georges St. Pierre, it appears B.J. Penn and his representatives have had a change of heart.

Penn's trainer, Rudy Valentino, told SI.com by text message that Penn has decided to move forth in filing a formal complaint with the Nevada State Athletic Commission alleging Georges St. Pierre's corner knowingly and illegally used Vaseline on his body to gain an unfair advantage Saturday night.

"Lawyers for B.J. are writting (sic) a complaint with the commission," Valentino said. "I just spoke to J.D. and B.J. a few minutes ago. They feel they have ations (sic)."

This story appears to have some legs.