The helicopter in the movie bringing the "Soviet master spy" to the abandoned monastery now serving as a training camp for the KA-spies has a Russian aircraft registration (RA-... or RF-... for govt-aircraft). In those days, the helicopter would have had a Soviet registration (CCCP-...). Additionally, the helicopter bears Russian tricolour instead of Soviet's red hammer-and-sickle flag.
In the beginning of the film when Evelyn Salt is being exchanged on the North Korean side of the bridge can be seen 2 armoured vehicles these are FV432's manufactured by GKN Sankey in 1962 for the British Army in use until the 1980's.
When Salt is hijacking a bike in the traffic jam, she got a Triumph Street Triple R. This bike a very specific engine (3 cylinders) and has therefore a very specific sound but on the soundtrack you hear the sound of a plain motorcycle.
At the funeral, the Russian President greets the US President and First Lady, then turns his back to squeeze past them to his seat. No Russian would do that. Rather than turn your butt toward someone, Russians will turn to face the person they are passing.
Orlov states his name as Oleg Vasilievich Orlov in the beginning of the movie. When the CIA officer looks him up in the next shot, the name is incorrectly listed on the computer screen as Oleg Vasiliy Orlov. In Russian, a patronymic (name derived from the father's name) is used as a middle name (commonly given with the first name as a compound name). "Vasilievich" is the patronymic meaning "son of Vasily."
Salt has spent her entire life becoming a CIA double agent, yet Orlov's appearance at the CIA, where he reveals that she is a sleeper agent, needlessly destroys all her effort. It makes no sense for him or his organization to do this.
When Evelyn is running through the security area, she tries to jam the door shut with a ladder, but doesn't get there in time, so she throws it on the floor. In the next scene when Winter is looking at the security camera footage it is shown to still be against the wall even though she just threw it on the floor.
In the car chase scene involving Salt and three police, Salt overpowers the two police officers seated adjacent to her and uses a Taser on the driver, effectively taking control of the vehicle. In one shot, the car is a 2010 Chevrolet Suburban, as shown by the tail lights. In all subsequent shots, the car becomes a 2001 Chevrolet Suburban.
As the helicopter at the end passes by the Washington Monument, we see the Ellipse and White House to its upper right. The film is reversed, as from south of the Monument the Ellipse and White House should appear to its upper left.
Before the action moves to New York, while the scene is still supposed to be in Washington, DC, there is a scene which supposedly takes place in Washington, but is recognizable as Riverside Drive near West 156th St. in New York City. In the background, a wrapper has been placed over a New York City street sign that reads "C Street" or "G Street" to make it appear as if it was in Washington.
Salt is released from North Korea via the Bridge of No Return in Korea's DMZ. It is depicted as a heavily fortified border crossing with armed troops on either side. In fact, the bridge stands in green fields, fortified only by two small guardhouses. It is largely disused and hasn't hosted any prisoner exchanges since the 1970s.
The movie is supposed to take place during the winter time as evidenced by the fact that there were no leaves on any of the trees during the scenes in D.C. and NYC. However, during the first chase scene on the overpass which took place in D.C. there were leaves on all the trees. This is because that scene was actually filmed in Albany, NY later on during the spring.
When Salt extracts venom from the spider, she inserts the needle in the abdomen. The location of the venom sacs are directly above the fangs, in the chelicerae of the spider; also there would not be nearly enough to be visible in the syringe.
Even though the CIA building has empty floors as security buffer zone, with elaborate sealing-off techniques, the window on the stairwell between the floors is neither bulletproof nor blocked with iron bars.
During the Vice President's funeral, the military honor guard does not have a member of the U.S. Coast Guard. Any U.S. state funeral will have participation of all five branches of the military, including the U.S. Coast Guard.
Near the final scene, Salt spots a yellow crescent-shaped area with a handle on the door of the UH-60 Blackhawk. She then uses that handle to jettison the cargo door and escape the helicopter. In fact, the handle shown jettisons the windows from the door making two 36x36 inch openings. There is no way to jettison the entire door.
While escaping in the police car, Salt is in the back, and the semi-conscious policeman has his foot on the accelerator. Salt steers while leaning over the seat and over the policeman's body. Close up shots show the policeman's foot on the gas pedal, and Salt accelerates the car by tasing the officer, forcing his leg to extend. Salt also changes gear from forward to reverse and back; this would not be possible here as automatic-transmission cars require the brake pedal to be depressed while the gear is changed.
The Nuclear Football requires the two-man rule: two different Cabinet members must provide two different codes to authenticate nuclear weapons release. Also, unlike in the film, the President does not enter the attack choices; he selects from a group of choices in folder and passes the order down to the relevant commanders.
The fact that Salt works for the CIA is completely irrelevant -- everything she does in the film is outside of the CIA. If anything, having spent her career in the CIA actually hinders her from (a) being a KA and (b) trying to save the Russian and US leaders.
At the end, while Salt was being transported by helicopter from the White House to Langley and under detention, she was told no one would believe her story on what really happened in the bunker. But the President knew. He witnessed everything that happened to his team who were all murdered by the mole as well as the intention of the mole was on what would happen next. The President got knocked out by the mole when he wouldn't cooperate, but he was finally carried out alive and on a stretcher and on his way to a hospital.
When the Vice-President's coffin is carried into the church, the flag's field is at the left rear of the coffin. Either the flag is misplaced, or the coffin is being carried feet-first into the church, which is against all tradition.
In the Theatrical Release, the President is unconscious, not dead, in the bunker. Upon regaining consciousness, the President certainly would have revealed Agent Winter, and not Agent Salt, as the culprit.
During the torture scene in Korea, a wide transparent hosepipe is forced into Salt's throat to pour liquid down. In the shot where the guard looks like he is pushing the pipe into Salt's throat he is actually using a slightly wide grip so as to not move the pipe. You can see the dirt and scratches of the pipe, backlit by the window light, don't move at all.
Toward the end of the movie before the President is secure in his bunker, the lead Secret Service agent tells Agent Ted Winter that once the bunker door is closed, not even his own men can open it. Yet after Salt and Ted Winter fight it is shown that the police are breaking open the door to get in.
Salt's Russian last name is stated to be Chenkov. However, in Russia and several other neighboring countries, women's last names are formed by adding an "a" to the male last name. Therefore, Salt's Russian last name should have been Chenkova.
When captured after the funeral scene, Salt is handcuffed with her hands in front. Since the 1960s the standard is to handcuff with the hands behind their back for reasons made obvious by the next scene. Also, the NYPD car she was transferred in didn't have a divider between the driver and the back seat, for again reasons made obvious in the scene.
After Salt fakes the assassination of the Russian president and the agents close in on her position, one of them kneels and checks the president's pulse. He can be seen blinking, despite supposedly being paralyzed enough to appear dead.