Its deal for Pringles on hold, Diamond Foods Inc has changed its top management after its audit committee found that the company had improperly accounted for its payments to walnut growers. Diamond named its director Rick Wolford as acting Chief Executive to replace Michael Mendes, and said Michael Murphy of Alix Partners will serve as acting finance chief in place of Steven Neil. Mendes and Neil have been placed on administrative leave, the company said in a statement. Diamond is i...