Continuity mistake: The Google Earth Streetview route shown through downtown Chicago (I-94/90) is not part of the computer-plotted route from O'Hare Airport to Ishpeming which they used. It would have been a long detour from the suggested path laid out for them. (00:34:30)
Continuity mistake: After the children are transported to Narnia, Edmund's hair is significantly shorter than it was while they were in England.
Continuity mistake: In the beginning when Shane and Diggs arrive at the hostage site Shane sticks a toothpick into his mouth. However, in the next shot the toothpick is missing.
Visible crew/equipment: In almost every scene with Stanley Tucci, you can see stage lights, crew members, or other equipment reflected in his eyeglasses.
Factual error: The construction of Hadrian's Wall as shown at the end of the film is not historically accurate. A wooden wall was constructed first with a deep ditch on either side. One of the ditches should be visible as the characters approach the wall but it is not. The stone wall shown being constructed was not added until later and then it was constructed in sections. It did not become a continuous stone wall until some years later. In addition, the stone wall shown is not wide enough. Hadrian's Wall is around 2 meters wide at the top and even today you can comfortably walk on top of it.
Continuity mistake: When Derek closes up his back pack, you can see that it falls open again. When both Derek and Becca walk into the food hall, the backpack is now closed.
Character mistake: Dr. Stonehill posts a sign that says "KEEP YOUR DAMN FOOD AND DRINK OUT OF MY REFRIDGERATOR !" Refrigerator is spelled wrong, "REFRIDGERATOR" as if the word is "Fridge" which is isn't. (00:52:00)
Continuity mistake: When Jamie is in the bus asking Maggie to come out, the glasses on his hands keep swapping places between shots.
Continuity mistake: Just before Secretariat's first race, the main characters are discussing tactics in the parade ring. In the background is a jockey in pink and gold colours standing by his horse. When the shot changes angles he is mounted and being led out onto the race track. This means that he would have only taken one second to mount and travel a distance of about 10 meters. A couple of shots later he suddenly appears again, but this time he is being led into the saddling-up area, even though the jockey is already on board.
Continuity mistake: Near the end of the movie, Ethan tells Peter that he had his wallet all along. Peter steps forward from the car wearing his glasses. In the very next shot, they are gone and nowhere to be seen. (01:16:30)
Continuity mistake: When Jake goes into the water with the tow rope around his waist, the rope is going over the top and through the railing of the boat. When he gets pulled away with the girl, the rope is seen down in the water.
Continuity mistake: Just before Declan and Anna are going to sleep in the B&B, when she agrees he can sleep in the same bed he is holding a pillow. He then puts the pillow on the bed and the pattern on his and hers pillows are on the left side, however the next scene shows that his pillow pattern is on the right. (00:56:55)
Continuity mistake: In the scene where Aldous gives Arron the adrenaline shot, the needle changes from being in his arm to being in his shoulder.
Revealing mistake: During the scene where Jennifer Lopez does not have her body pillow, she has to use her friend/neighbor as a pillow so she can sleep. The nightshirt Jennifer is wearing allows you to see the fake pregnancy belly she has on.
Factual error: Early in the film following Lincoln's assassination, we see a newspaper stating that Lincoln's body is being transported to his final resting place of "Springfield IL". At that time the state either wouldn't have been shortened, or "Ill." would have been used. The two letter state name abbreviations were not introduced until the 1960s, at the same time as ZIP codes.
Factual error: During the scene where they deliver electroconvulsive therapy to Kristen, the physician is seen holding the patient. Considering the level of charge delivered, the physician should have received a shock along with the patient.
Factual error: When Barry swallows the car key on the way to the airport, he holds and swallows a Ford car key, yet they are driving a Citroen Xsara. (00:08:18)
Continuity mistake: When the three guys are having lunch, in one shot the traffic is at a stand still, but in the next shot seen in the reflection of the window, the traffic is moving fast. Next shot it is at a stand still once again.
Continuity mistake: Neither Abra, Betty or her kids age a single bit in a time span of 20 years.