Continuity mistake: During entire scene with dancing king Herod and his men, shadows on the floor are at different angles from one shot to another. (01:16:15 - 01:19:30)
Audio problem: During the song "Judas' Death", Caiaphas sings the line "What you have done will be the saving of everyone", but his mouth is saying " the saving of Israel", the song's original lyric. (01:24:00)
Answer: According to Ted Neeley and Norman Jewison on the DVD commentary, the shepherd walking across the frame in the final shot of the film was never intended to be there, and just happened across the shot as they were filming. Because of the significance of a shepherd in the teachings of Christ, Jewison and the crew were struck profoundly by the timing of this shepherd crossing the field, and kept the shot. They got a perfect sunset, as well as a subtle depiction of the resurrection.