PALMDALE - "Pirates" fans might want to keep a weather eye open for Johnny Depp and other stars of their favorite swashbuckling adventure flick. Filming of "Pirates of the Caribbean: At World's End," the third installment of Disney's hit franchise, has relocated to Site 9 in Palmdale from Walt Disney Studios in Burbank, unit publicist Michael Singer confirmed Monday. Contrary to media reports that circulated over the weekend, Rolling Stones guitarist Keith Richards did not make a slightly tipsy cameo appearance as Capt. Jack Sparrow's father at the former aircraft production hangar at 30th Street East and Avenue P. Filming...