All's quiet on the set of Fox's The Simpsons. According to Variety, voice actors Dan Castellaneta (Homer), Hank Azaria (Moe, Apu), Harry Shearer (Mr. Burns), Yeardley Smith (Lisa), Julie Kavner (Marge) and Nancy Cartwright (Bart) have not shown up for the last two script readings because of a contract dispute with Fox. The six cast members allegedly want their $125,000-per-episode salary bumped up to $360,000. That noise you hear is 600 cases of Duff Beer being wheeled into Fox's executive suite.