As we reported last night, Leo Nucci got sick in the middle of Macbeth and had to be replaced by his understudy; Violeta Urmana had a bad night as Lady Macbeth; she made several mistakes, and she was quite roundly booed at the end of the night.
The problem is, la Scala had already done Graham Vick's Macbeth a few years ago, with Riccardo Muti on the podium (now it's Kazushi Ono) and a healthy Leo Nucci as Macbeth. Maybe some productions are better left un-recycled.
(Not to mention if it's true that la Scala is seriously grooming Urmana to do la Scala's first Norma in a generation next year, we might be in a lot of trouble)