When Evelyn is climbing on the outside of the building, in some shots her dog's head is visible sticking out of her backpack. In other shots the backpack is zipped up tight.
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.
When Salt returns home looking for her husband, she sees a sandwich with two bites taken out of it. In the next scene during the raid by the CIA, a half-eaten sandwich is seen.
When Orlov briefs Salt on the boat, he points out that the plane's tail number will be N182SL. But as the plane takes off, its tail number can be seen as N188SL.
When Evelyn first goes on the run, she enters a stairwell, takes off her shoes and tosses them in the corner. The next shot shows the security camera's view. The shoes are in a different position.
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.
When someone receives an electric shock, the muscles contract, not expand. That means every time she zapped the police office with the TASER, his foot would have come off the pedal, not pushed it down.
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.
When Salt opens up at point blank range on the armored glass window the bullets would ricochet making her position very dangerous. Instead the bullets just disappear. (There is a bullet-resistant composite that 'catches' the bullets rather that repel them. As the bullets aren't seen suspended, the window isn't made of that, either.)
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.
When Salt is hiding from Peabody beside an air conditioning condenser unit, the unit only shields her head from his view, meaning her lower body would be visible. But in the next shot, from his position, you see only the condenser unit with her being completely absent.
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.
At the funeral, the casket is shown in the cathedral draped in a US flag. The union of the flag is supposed to be over the left shoulder of the deceased. If that is the case then the body is lying with its feet toward the altar. This is the reverse of proper orientation. The head should be toward the altar during the eulogy and ceremony, then the honor guard would reverse the orientation and carry the casket out head first.
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.
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.
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.
In one of the Washington DC scenes, Salt is seen entering the Archives/Navy Memorial Metro station, and emerging from the L'Enfant Plaza station, without ever boarding a train.
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.
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.
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.
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 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."
Orlov identifies "a Soviet Olympic wrestler named Sasha Fyodorovich Chenkov." Sasha is not a name. It's the diminutive of Aleksandr. No Russian would ever use "Sasha" together with the patronymic (middle name). He also identifies Nureykeva as "Anya," again a diminutive and not a legal name.
A trained intelligence officer would never argue with a walk-in or show skepticism as Salt does with Orlov. The objective is to encourage the subject to talk as freely as possible so that their reliability can be determined later.
Agent Salt is not seen paying the cab driver after escaping the CIA building.