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La Travatore Is this Il Trovatore or La Traviata? :)
Only opera I ever saw seriously booed was a production of GIOVANNI in which the title character made his entrance from inside a dead horse.
There's also an infamous production of Strauss' THE BAT which the director staged as taking part in the 1930s, with the Act Tree jail a concentration camp. The audience was so vicious in its response that he had to be escorted out a side door for his own safety. Ironically, it's now available on DVD,
http://docandraider.com