Several of the California National Guard troops are depicted as being armed with M16A1 rifles (distinguished by their smooth, triangular forward hand-guards and three-pronged flash suppressor). The National Guard phased out the M16A1 in the 1980s, replacing it with the upgraded M16A2 (ribbed, rounded forward hand-guards, and an enclosed, "birdcage" flash suppressor).
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.
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.
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.