In the Nazi party shoot-out, the sculpture of David has his privates blown off by gunfire, but they are clearly in tact during a following scene.
An Embraer 110 Bandeirante (aircraft made in Brazil) is shown in the movie, which is supposed to take place in 1967. This type of aircraft flew its maiden flight in 1968, and entered service in 1973.
During the beach scene with the hippies, Minnie Ripperton's "Lovin' You" is playing. The movie is set in 1967. "Lovin' You" was not recorded until 1974.