Corrected entry: 'Back and to the left' is not strictly true, JFK's head flies forward very fast and then rockets back, you can see it on the Frame-by-frame analysis on web sites. And, heads can fly towards the bullet's entry wound.
Corrected entry: After David Ferrie is found dead, the next scene shows an FBI agent sternly warning Bill Broussard to stop investigating the JFK assassination. Umbrellas are open and it appears to be pouring rain. However, as the camera pulls back the sun is shining fiercely, there is blue sky everywhere, not a cloud in sight, yet the rain still falls seemingly from nowhere. (01:48:49)
Corrected entry: Governor Connolly was actually sitting in a jump seat twelve centimetres lower and half a metre to the left of JFK, which means the 'through and through' (or magic) bullet is entirely credible. Stone repositions him in the limousine to a position level with and directly in front of JFK, and reproduces this misinformation in the court room scene using stand-ins. This makes it seems like the bullet turned and twisted in mid flight, a key piece of conspiracy theory 'evidence'.
Corrected entry: In the sniper's nest, Jim Garrison mentions Clay Shaw, but the name "Clay Shaw" isn't used until later in the film.
Corrected entry: Right after the scene where Kevin Costner leaves his meeting with Donald Sutherland in Washington he returns home. A news bulletin comes on the TV featuring scenes of the now famous Zapruder film. However at the end of the movie, during his closing comments at the court case, Costner informs us that the film has never been released to the public. Funny how NBC has a copy.