Factual error: In the yard scene when Dewey tries to change the switch, the throttle lever slips from idle to full power. This would not have been possible. Throttle levers are notched, and require significant force to move.
Factual error: On the cliff top before the battle on the beach, you are treated to a lovely if fleeting glimpse of wind farm turbines, not really fitting for the 12th Century.
Factual error: When Mark types email addresses in to tell people about facemash, he writes to several people @harvard.edu. At the time the movie takes place, undergraduate email addresses were all of the form username@fas.harvard.edu. Furthermore, the network brought down by facemash would have been referred to as the FAS network. (FAS stands for Faculty of Arts and Sciences; the eponymous network covered all buildings within the College and Graduate School of Arts and Sciences.).
Factual error: The type of book that Eli is protecting would actually be just a fragment. The complete Bible, in braille, occupies as many as 18 volumes.
Factual error: The day Carrie arrives in NY: June 11, 1986 was a Wednesday not a Tuesday.
Factual error: Frank and Elise approaching to Venice by train. Train announcement says "Arrival at train station Santa Lucia in ten minutes". Landscape from the train window is green and hilly. I'm from Venice and no way you find such landscape 10 minutes from Venice Santa Lucia. Most probably you would see a gray Mestre, Venice inland city, or a completely flat and not green land (for at least 30 minutes from/to the train station of Venice). (00:19:30)
Factual error: When Ewan McGregor drives to Belmont MA to visit Paul Emmett, he checks the mailbox to see whose mail it's addressed to. It shows the name Paul Emmett, address, Belmont MA 02324, which is the wrong zip code; it is the zipcode for Bridgewater MA, and Belmont MA should be 02478.
Factual error: When Tommy and Kathy go to visit the madame, that part of the movie is set in 1994, but we see two cars that don't fit in that year: a gray 1997-2004 Volkswagen Passat that drives past, and a gray 1996-1999 Citroen Saxo parked a few meters away from madame's house. (01:21:20)
Factual error: In the flashback, when Teddy was among the soldiers liberating Dachau, there is a semi-circular sign above the gate that says "Arbeit Macht Frei". Dachau had a sign with those words on it, but its sign was oblong. The sign at Auschwitz was that shape.
Factual error: In the scene of King George V's 1934 Christmas Broadcast from Sandringham, there are factual errors. The B.B.C. Engineers are shown operating Outside Broadcast equipment in a room adjacent to the King - but the equipment (BBC Type OBA/8) didn't even come into service until 1938. It should have been type OB/7 in large mahogany cases. Also, the ornate Royal microphone cases were the wrong ones. These were the later (c1937) type first used by King Edward VIII in his Broadcast in 1936.
Factual error: When talking about the planned robbery of Fenway, the florist mentions a four-game series with New York. However, later the crew is in a bar and a clip of the baseball game is being shown on the television. The game being shown is against Toronto. Since this scene is supposed to be just prior to the heist, one would expect the visiting team to be the Yankees, not the Blue Jays.
Suggested correction: There's nothing to indicate the clip in the bar is from a current game. Sports networks often show classic games in repeats.
Give me a break, they screwed that up.
Suggested correction: A robbery of that size and risk would require several days of planning and preparation. Doug and Jem probably went to the park during the series against Toronto to scope the place out, and the planning and preparation continued until the end of the series with the Yankees when the robbery occurred.
Suggested correction: There is no indication on what day it is. It's possible that it's Wednesday before 4 days. Or it's Thursday making the series get played on Friday, Saturday, Sunday, Monday.
Factual error: At the start of the movie it said "NEW YORK CITY 2000", then went to a panoramic view of New York City minus the Twin Towers. Even though they stated the year was 2000 and they didn't go down until 2001.
Factual error: At the end of the first semifinal, as Cheng's gang gather to congratulate him, the events are being recorded for posterity by a photographer standing about 6 feet away, who, unfortunately is using at least a 200mm lens. I'm not sure he could even get Cheng's left eye into focus.
Factual error: As the three Israeli agents are stepping off a plane in Israel in 1966, one of the cars viewed behind them is a 1978 Olds 98 (with its late 70's square headlights). (00:01:45)
Factual error: In the home video scenes, which were supposed to have been filmed during the 1970s or earlier, young Mickey Ward is shown wearing gloves bearing the Title Boxing logo. The Title Boxing company wasn't founded until 1998.
Factual error: The paramedics apply the neck collar to Kick Ass after he was hit by the car. The problem is he is already on the spinal board when it is applied. Neck collars are always applied before putting the patient on the spinal board, especially when head or neck injuries are suspected as would be the case in being struck by a car. Even if there were no witnesses to him being hit, paramedics would assume a neck/head injury if no one saw the incident. Also, the paramedic doesn't immobilize his head before applying the collar, and is far too rough in putting it on.
Factual error: The epilogue dates the main story as having taken place in the 1870s. In the opening scene, the locomotive tender has distinctive cast Bettendorf trucks (bogies) which were not introduced until c. 1900.
Factual error: The movie starts off saying its 2007 and Smart Cars were not sold in the US until 2008.
Factual error: In both scenes with Brian, Aron's boss, he is wearing a T-shirt that can be identified as being a product of the website www.someecards.com. This website did not launch until 2007, but the movie is set in 2003.
Factual error: Clooney refers to the rifle as an "M14". The Rüger Mini-14 is a different rifle than the M14 (used e.g. by the Marine Corps prior to the M16).