Five former employees of Bernard Madoff, scheduled to go on trial in October for allegedly helping the convicted con man carry off the largest Ponzi scheme in U.S. history, are seeking a two-month postponement, Bloomberg News reported yesterday. U.S. District Judge Laura Taylor Swain set an Oct. 7 trial date for the fraud case against Daniel Bonventre, Annette Bongiorno, Joann Crupi, Jerome O’Hara and George Perez. The defendants, who have all pleaded not guilty, are charged with crimes including conspiracy, fraud and falsifying records.