Continuity: When Talbot first talks to Betty as she's entering the building, the screen cuts in half as per usual throughout the movie. In one shot, Betty's hand is on the upper part of her pocketbook strap. In the other shot, it is not. The two shots are not in sync.
Continuity: The breast pockets on Betty Ross's denim jacket switch from buttoned to unbuttoned between shots when she is confronted by David Banner in her house at night, and again, later, when she approaches the Hulk in downtown San Francisco.
Continuity: When Betty is drinking the beer, the bottle turns round between shots.
Continuity: When the Hulk pulls the poodle from the windshield of Betty's car the entire windshield is smashed. The next view of the car shows only a hole on the driver's side of the windshield.
Revealing mistakes: After the Hulk kills the dogs and goes to the river to cool down, from the rear Bruce Banner appears naked, but as he approaches the car where Betty is, you can briefly see he is wearing skin-colored underwear which he tries to cover with his arm.
Continuity: When Hulk is falling from the fighter jet, he falls through several thick layers of clouds. When we see him hit the water, there are no clouds in the sky.
Boom mic visible: In the scene where the Hulk is talking to Ross, a boom mic droops down into the shot.