When the guys are getting armed to go rescue Cheryl, Hammer's jacket disappears and reappears when he picks up the 2 shotguns.
The extra that walks past Slade and the reporter passes a few seconds later, in the same direction, when Jack introduces himself to Slade.
During the Stolen TV Race, the dogs run past the runners. In the next scene the dogs are behind the runners, chasing them again.
During the Soul Train (1971) line dance, Cheryl kicks people in the face with her white boots. At the end of the dance, her boots are black.
Kalinga turns the bean soda label toward Jack Spade. When the camera is on Spade, the label is facing Kalinga.
After Slade introduces his band for his theme music to Jack, the drummer is very clearly not touching the drums as he waves the drum sticks.
When Cheryl identifies herself as Junebug's widow at his burial, she says, "He was my husband," but her lips say something else.
Incorrectly regarded as a goof: During the diner fistfight where Mrs Spade (Ma Bell) fights Mr Big's two goons, Ma Bell occasionally turns into a mustachioed Caucasian stuntman between action scenes. This is a deliberate act and not a mistake (showing the tackiness of old Blaxploitation movies).