There has been plenty of speculation about what caused the premature death of Mozart a month short of his 36th birthday in 1791. Watch the 1984 movie Amadeus and you may come away thinking Mozart was poisoned by Antonio Salieri. Personally, I never bought into that. The latest theory? Perhaps it was a bad case of strep throat that ended Mozart's life. Thanks to Performance Today's Suzanne Schaffer for the heads up.