Factual error: The 5th Amendment to the Constitution simply states that "No person... shall be compelled in any criminal case to be a witness against himself." There is no actual or implied provision that means once you have answered a question, you can't plead the 5th on any subsequent questions, as the movie depicts.
Factual error: Viggo is "playing" the bagpipes on the wrong side. They should be under his left arm, not his right. He is also not blowing hard enough to make the required sound. They sound good, though.
Factual error: For the third movie in a row -at least they are consistent - Maggie introduces herself as Detective of the SFPD, but detectives are not referred as such, but as Inspectors.
Factual error: When Joe and his girlfriend, who is also Albert White's mistress, walk through the hotel room kitchen, that whole kitchen, is not a 30's era kitchen. It even has a convection oven and a blast chiller, pan racks, etc. that are more from this time.
Factual error: Curiously enough, Michelle's mess in the bathroom with the self-tanning spray seems to be mostly made by footprints everywhere (but you don't tan your palms and soles, and the bottom of the foot is what she is using to lean on the wall anyway) while the spray she continues to apply does not color the tiles and towel in the slightest and nothing drips from the smooth surfaces.
Factual error: Tommy states that Jimson Weed is a paralytic, but it is not known to have this property. It is however a powerful hallucinogen and deliriant.
Factual error: There would be no room for a thumb drive inside of a real Rubik's Cube due to the way they are constructed. When dismantled, the individual moving parts are quite small. It would certainly be possible to construct a facsimile of a Rubik's Cube that would have enough room, but it wouldn't be a fully functional puzzle the way it was in the film.
Factual error: In the wedding and arrest scene the U.S. Customs Service officials have police attack dogs. The U.S. Customs Service only has drug detection dogs. (01:57:00)
Factual error: The open credit sequence takes place at the Atlanta Airport (Hartsfield Jackson), signs are throughout the Delta terminals, Boston Airport announcements are dubbed in until we see John Cusack come off the airplane.
Factual error: The presidents of South Africa, South West Africa and the Rhodesias all object to Seretse and Ruth's marriage. But the head of state of all these countries and territories at the time was King George VI. None of them had presidents.
Factual error: When the boy sends the letter, it already has a postmark.
Factual error: Toward the end of the movie, we see a B-2 Spirit releasing bombs over the town. This is very unlikely, as this is probably the most expensive aircraft to operate in the USAF arsenal, and it has only 20 of them. There is no reason to use it over an area with no hostile enemy fire, when much cheaper and more available aircraft can to the same task.
Factual error: During the scene when Ed the I.T. guy is working on his laptop to fix the problem with the presentation, his laptop is sitting on top of a couple of Cisco network switches with cables connected to them. The ports on the front of the switch where the cables are plugged in would have flashing lights on to show power and connectivity, as well as lights on the left-hand side of the device as we are looking at it, no lights are present which suggests it is not powered up and connected to anything. (00:06:58)
Factual error: The limo shown is a 1990 (or later) Cadillac. It has large halogen headlamps and not the dual headlamps of a 70-71.
Factual error: The nearest tube station to Wembley Stadium is Wembley Park or Wembley Central and not Park Royal at all.
Factual error: Many details are wrong in Elizabeth's execution. The scaffold is in the prison yard, whereas by this time it was inside. The noose has a knot as opposed to the simple slider which was used by this time. Nobody is present except the hangman and one warder, whereas in fact the usual execution party was the prison governor, the chaplain, at least two warders, the hangman and his assistant. The hangman is masked, which never happened in Britain.
Factual error: When Vinny Panzienza has his cervical halo brace removed (without anesthetics), he yells and groans and grunts in pain, but his hands are relaxed on the arms of the chair. I can tell you, from experience with this exact situation, the pain is so intense that his hands should have been clenched as tight as a vise.
Factual error: As it happens in many Hollywood movies, we have a gun that is "ceramic" (actually a polymer, "plastic" as Ben corrects himself later) that is entirely stealthy, able to fool the metal detectors at the entrance of a building. It's not an imaginary high-tech device, but is explicitly referenced as the FN Five-seveN handgun (here called repeatedly as FN Five point seven). The metal detector would still pick up the metallic parts and the bullets. (00:40:25)