Factual error: In the poster shot and in the film, the wave from the Atlantic carrying the carrier JFK into a collision with the White House comes crashing in from the west because the south portico of the White House is seen. The Atlantic Ocean is east of Washington, so the wave should come from the other direction. And even a wave coming from the east could not have made the JFK (CV-67) crash into the White House because the carrier was retired in 2005 and is berthed in Philadelphia, which is northeast of Washington DC.
Plot hole: Inmediately after Jamie Foxx finds the bomb in the city hall, and he says, "We don't tell the mayor anything", we see Gerard Butler arriving to his property next to the prison, and finally he enters his jail cell. So, in the time between Gerard Butler's arrival to the property and his entrance to the jail cell, Jamie Foxx thought about a plan, picked up the bomb, passed through the traffic and security checkpoints, talked to the warden to get access to the prison, entered solitary, handcuffed the bomb, and still had time to wait for Gerard Butler's arrival.
Continuity mistake: In the dormitory, when lovestruck Ron is going gaga over Romilda, he is wearing a brown sleeveless tee shirt and its tan trim has many holes. When Harry brings Ron to Slughorn, Ron is still wearing that tee shirt, but now some of the holes are gone and the rest of the holes have changed position. (01:26:50)Super Grover
Factual error: During the first tunnel sequence, all the cars travel very far into the mountains, turn lots of corners, yet not only is Gisele still able to speak to them over the radios, their GPS still works. GPS signals invariably need a clear 'sight' of the sky and can penetrate light cover, but most certainly not that depth and cover. (00:58:05)GalahadFairlight
Continuity mistake: In the dream scene where Larry writes on the blackboard in front of the student audience, when Larry writes on the blackboard he writes the wrong formula "delta p = square root of <p>^2 - <p>^2". The bell rings, the students leave and you see Larry again in a close-up and above his shoulder you see the the first 2-squared moves from outside the bracket into the bracket. (01:06:35)God-of-War
Visible crew/equipment: At the start of the scene where Evan is racing to the school to get to the choir, you see some buildings. If you look down when the angle is turning to the right, it focuses on some cranes, a camera, and a wire holding it up, and a crew member is visible in the reflection of a red window.Low Cow