Continuity mistake: When Dr. Ross and Bruce are in the hotel room, Banner empties the purse on the bed and there is some cash inside the wallet. As they are about to leave he picks up the cash, which isn't in the wallet anymore. (01:08:10)
Continuity mistake: During the street chase in Brazil, the time of day changes from night, to perhaps late afternoon/evening, to night again.
Continuity mistake: At the beginning of the movie, when the general wears his dress greens, his epaulet rank has the stripe near his neck. Later,in a shot about halfway through, the stripe is near his shoulder.
Continuity mistake: As Emil is in the men's restroom looking at the mirror, some of his hair is hanging over his forehead, but when the shot changes, his hair is suddenly brushed back.
Continuity mistake: When Bruce and Betty are hugging on the bridge, they turn back and forth about a quarter of a turn whenever the camera angle changes.
Continuity mistake: When Hulk throws the chunk of sheet metal at the helicopter, it glances off the rotor housing (taking a ragged piece with it.) When the chopper crashes, however, the propeller comes off with a perfectly clean edge, as if the projectile had sheared completely through the base.
Continuity mistake: After the first time we see Bruce transform into the Hulk, he has hitched a ride with the elderly man. You will remember he has 3 1/4 length pants on with a few rips. It cuts to a quick clip of him walking up the road but this time he has full length pants on. They switch back to shorter length pants straight after.
Continuity mistake: When Dr. Ross empties her handbag on the bed, there is a Givenchy compact with the Givenchy insignia face up. When the bed is shown again, the compact is face down.
Continuity mistake: When Abomination pins Hulk to the wall, and Hulk starts to push back, at first, when the camera view is level with their heads, Abomination's left hand is grabbing Hulk's right forearm. But when the camera view lowers to their abdominals, Hulk's right hand is grabbing Abomination's left forearm.