Nicola Luisotti, known in the U.S. as music director of San Francisco Opera, has resigned from the same post at the Teatro San Carlo in Naples. Unlike other recent departures, Luisotti’s statement was soft-spoken and cordial, saying only that his other commitments don’t permit him to stay on. Yet things are rarely so simple in Italian opera houses, and two other senior staff members have left recently as well. (in Italian)