Other mistake: When Ben, Riley, and Abigail show up at Ben's fathers house, the screen shows a title stating they are now in Philadelphia, PA. However, when Ben's father confesses that he donated the Silence letters, he says "I donated them to the Franklin Institute in Philadelphia." Normally when you tell someone where something is, you don't include the city if you are located in that city at the time. (Not to mention that I'm sure Ben knows exactly where that museum is anyway). This coincides with the next scene where you see sky shots of downtown Philadelphia and the Ben Franklin Bridge, implying they are driving into the downtown area. That means they would be coming in from New Jersey. Maybe Ben's father is supposed to be living in Jersey somewhere, and not in Philadelphia.
Other mistake: When Ian is breaking in to take the Declaration of Independence his team uses a plasma cutter to cut through some metal. A plasma cutter of that size (fairly small and portable, but able to cut through metal of that thickness) requires a 220v power supply and a compressed air supply. I doubt there was a 220v power plug in that area, and I didn't see them carrying around any kind of compressed air tank.tavenger5
Continuity mistake: The school boy is counting letters on the Dogood letters and runs out to give them to Riley. As he crosses the street, he passes a cab and a Taurus station wagon. On his second trip out, he passes the same two cars again.
Continuity mistake: When Ben is trying to grab Abigail from Ian's vehicle, we see a bus coming. There is a car on the right side of the bus (Riley's left side) in that shot. We then see Viktor stepping on the brake and Riley start pulling to the left of the bus; when Riley swing around to that side to miss the bus, the car has disappeared.Sheri Hartman
Continuity mistake: When Riley is in the Subway to install the video feed, he places his laptop on a table. On its left side there is a little antenna. When the laptop is on the ground, the antenna is horizontal. In the next shot, the antenna is already folded out in a 45° angle. (00:30:05)Ronnie Bischof
Continuity mistake: When they blow the back of the Declaration with the hairdryer, Ben writes down the numbers. When he explains to Reilly how an Ottendorf cipher works we see that there are 2 columns with 17 lines each. This leaves us with a possible 34 letters. However the riddle that they decipher from the Dogood letters have 89 letters in it. After Ben writes down the last letters Abigail switches off the dryer and we can also see that it was the end of the page so there is no way that there was more space to get more letters.
Continuity mistake: When the FBI storms into Ben Gates' apartment, an agent is researching the Silence Dogood letters on his Hewlett Packard laptop. However, the web browser displayed on his laptop is the Mac Safari browser. HP laptops don't run Mac software so the "photoshopped" shot of the web browser on the laptop was done on an Apple Mac. (00:57:20)
Factual error: On the back of the Declaration of Independence when the Masonic square and compass are revealed, there is a "G" in the center. This "G" was not used until the period of the Civil War. Confederate Masons refused to use the "G" as they considered it a Yankee trick. Even today the Grand Lodge of England does not use the "G." For these reasons it would be unlikely that the Masonic symbol displayed on the Declaration would have included a "G."
Continuity mistake: At the Charlotte down in the cargo hold when Ben has just figured out that the riddle refers to the Declaration of Independence, Ian's stocking hat keeps changing between scenes. He's got a two-toned hat with a jagged edge between the two colors. Sometimes, the edge is turned up so far you can't even see this design. At other times, the edge is barely turned up and crooked and the jagged edge between the colors is very prominent.Sheri Hartman
Factual error: When Ben, Riley, and Abigail are in Independence Hall in Philadelphia and roll out the Declaration of Independence to inspect with Ben Franklin's special "ocular device" that Ben had just found, Ben pauses to take in the moment. When asked what was the matter, Ben says "It's just that...the last time this was here (in Independence Hall)...It was being signed." However, according to archives.gov, "In 1876 the Declaration traveled to Philadelphia, where it was on exhibit for the Centennial National Exposition from May to October. Philadelphia's Mayor William S. Stokley was entrusted by President Ulysses S. Grant with temporary custody of the Declaration. The Public Ledger for May 8, 1876, noted that it was in Independence Hall "framed and glazed for protection, and... Deposited in a fireproof safe especially designed for both preservation and convenient display." Sorry Ben.
Character mistake: At the gala, Ben describes to Abigail how the Founding Fathers would have been hanged, beheaded, drawn and quartered, and had their entrails burned had they lost the war. However, only hanging and beheading were acceptable practices in Britain at the time; Ben's information is off by several decades.Texijapi
Continuity mistake: When Dr. Chase is entering her password she goes for the first letter on the keyboard. Her little finger is at the right end of the space bar and her index finger is hitting the key. When the shot changes to the close-up of her hand, the little finger is in the area of the CTRL key and the middle finger is the one which hits a key, in the area of the m or comma key. (00:33:15)Ronnie Bischof
Other mistake: When Ben is threatening to throw the flare down into all the gunpowder, knowing what would happen when the fire strikes it, there are all kinds of sparks falling from the flare down into the fire anyway. Wouldn't one of those sparks would easily have set the powder off? (00:19:35)
Continuity mistake: When Ben is in the Men's restroom taking off the overalls to reveal his tuxedo, he is in front of the third or back sink. He turns, throws tool belt away, turns back toward mirror and grabs his drill and starts to leave with the red NO SMOKING sign on the mirror up to his left. Then he stops to look in the mirror again as Riley says "How do you look?" He is looking into the mirror straightening his tie and the red NO SMOKING sign is on his right. The next frames he is back in front of the third sink smoothing his hair back and the NO SMOKING sign on his left.Sheri Hartman
Continuity mistake: The Declaration of Independence in the clear plastic cover keeps changing colors from brown to white and back. When Ben puts it in the very first time while in the elevator, it is brown. When Ian gets the case out of the street after Abigail loses it, it is white. It is back to brown in the church.Sheri Hartman