Audio problem: During the opening overture, right when the orchestra starts "Maria", you can hear someone sneeze in the background. It's easier to hear on the soundtrack but you still can hear it in the movie.
Audio problem: During the "Officer Krupke" song, when Riff is sent to the analyst, just before the start of the verse, someone says "whoops" and it isn't part of the song.
Audio problem: After Anita discovers Tony and Maria's tryst, Maria says "Now you know." She completely botches her Puerto Rican accent. She practically sounds British.
Audio problem: When the sharks are singing "We're going to hand them a surprise tonight" in the quintet version of Tonight, someone sings the wrong note on the word "Tonight". (01:33:20)
Answer: People would not come to the theater to see Marnie Nixon despite the fact that she has sung the lead roles in West Side Story, The King and I, and My Fair Lady. They'd rather see that darling girl from "Miracle on 34th Street" again (or Deborah Kerr or Audrey Hepburn) than an unknown with actual talent.
Myridon