New this month Continuity mistake: When Captain America, Black Widow and Hawkeye are fighting their way through the Chitauri in the S.H.I.E.L.D. jet, one shot shows the Chitauri blasting at the jet causing part of the front of one side to get blasted and a burn mark is left on the jet. A few seconds later, Loki blasts one of the engines and the burn mark on the front of the jet has vanished.
New this month Continuity mistake: After the Chitauri have arrived, Loki stands on the Stark Tower balcony and looks on New York. In this shot, Loki is standing facing the city directly, but by the next shot, he's suddenly standing 90° in the other direction with his head turned to the right, in order to be looking the same way as in the previous shot.
New this month Continuity mistake: When Hawkeye is breaking onto the Helicarrier, he and some snipers break down a duct cover and enter. When the cover lands on the floor, it is resting away from some pipes with some slats missing. As soon as Hawkeye enters the duct, the cover is now resting against the pipes, and the slats have reappeared.
New this month Continuity mistake: When Steve and Coulson land on the Helicarrier, you can see two wings on the edge of the helicopter they were in and they are both closed up. Next shot, as Romanoff approaches the helicopter and Steve and Coulson exit, we can see one of the wings is completely open.
New this month Continuity mistake: After Hawkeye fires an arrow at the Helicarrier and part of it explodes, Bruce and Romanoff are knocked out of the room and land on a lower level. As they land, they are shown to be right next to each other, but when they are shown next, the distance between the two has increased by at least two feet.
New this month Continuity mistake: As Nick Fury and Selvig are talking about the Tesseract, an overview shot is shown where Fury says "I assumed you pulled the plug" and Selvig says "She's an energy source." This shot shows Fury and Selvig in the far background and we can see they are standing even with each other, but in a sudden close-up of the two, Selvig is suddenly standing in front of Fury.
Continuity mistake: When Maria Hill is being attended to after she gets hurt, her earpiece is on the left side of her face. In the next shot she is talking to Nick Fury and her earpiece is on the right.
Factual error: During the scene on the Helicarrier where Bruce Banner "Hulks out" and jumps at the F-35B hovering just outside, we see the F-35B fire its guns, one inside each of its intakes. The F-35B has only one gun, externally mounted to underside of the fuselage. It would be impossible to mount a gun inside an aircraft's intakes.
Continuity mistake: This is just after Coulson walks into Stark's office and hands Pepper the file on the Avengers, which she promptly passes on to Stark. In the front shot, she is holding the champagne glass down by her waist. Cut to the shot from the back and you can see the glass just above her right shoulder.
Continuity mistake: After the big battle, Iron Man lies on the street when Capt. America, all dirty and messy, says "We won." Iron Man sighs in relief and rests his head on the pavement. A frame later, from a wide angle, his head is raised, plus Capt. America's face is clean and his hair is brushed.
Continuity mistake: When Tony arrives at Stark Tower, he and Pepper share a bottle of champagne. In the shot where he says "Next building is going to say Potts on the tower", Tony's champagne glass is in his hand and there's no sign of another glass several inches either side. In the next shot, Pepper's glass is suddenly 2 inches away.
Continuity mistake: During the big battle against the Chitauri, Captain America is zapped with a blaster bolt. When Thor helps him to his feet we can see a significant amount of damage done to his suit, just below the star on the right hand side. But later on after Iron Man destroys the Chitauri ship with the nuke, the damage is completely gone.