Continuity mistake: When Rachel goes to the "group", her bag is multi-coloured; when she comes home from the "group", her bag is different, it is now just black.
Continuity mistake: When Peach collapses on top of Mario after the weird TV invasion, Mario's arm is on top of hers, but in the closer shot that follows his arm is distant and in fact it is behind hers the moment he turns a little.
Continuity mistake: After Eugene takes the stage to face Jack Butler, everyone (including Eugene) turns when Scratch walks into the room. When Scratch sits down and Eugene turns back to face Jack Butler, Eugene's hat is gone.
Other mistake: Maureen cuts her wrists with a razor blade. Days later, no bandages or scars.
Continuity mistake: Marjorie sprays the rapist in the left eye, mostly, with insect spray, but later it is his right eye that is affected the most.
Audio problem: Although the protagonists are all American, the actors are all English. This is why several characters mysteriously switch accents part of the way through the film - Marty speaks with a solid English accent after his first few lines.
Revealing mistake: When Eddy's mother is lying dead on the bed, she is breathing.
Visible crew/equipment: When Crispin Glover goes into a telephone booth to make a call, the cameraman and his camera are reflected in the glass.
Continuity mistake: After the car accident, a man in a black hat and coat runs up to the left-side rear window of Patton's car, taps on the glass, then peers into the car. The camera angle changes to show the Jeep arriving and we see the same man in black arrive again to repeat all the same moves exactly. (01:13:30)
Continuity mistake: Jane Fonda gets out of Jeff Bridge's car in broad daylight, but when she enters the dead man's house, it's night-time.
Continuity mistake: The amount of roaches in the bowl at the bar changes from less to more.
Continuity mistake: In the scene where he is fixing breakfast for his daughter, Robert Redford's shirt sleeves are down. When he goes to rescue the burning toast in the oven, his shirt sleeves are up and then they are down again. (00:15:00)
Continuity mistake: Torok the Troll wears a magic silver ring which allows him to appear in the form of Wendy Potter. However after Wendy's mother tells her about the orange juice, when Wendy touches the cold bottle of milk in the fridge she grabs her arm in pain and we can see both of her hands, and she's not wearing that magic ring.
Factual error: Ted Bundy is trying to pick up a potential victim in front of a record store, where a poster of Stevie Nicks' album, Rock a Little, is displayed. This scene took place in the mid-1970's, but Nicks' album was released in 1985.
Continuity mistake: The views of von Ragnar at the wheel of the semi truck show him wearing tight-fitting glitter gloves as seen into the cab, but large, looser, darker gloves in closeup shots of von Ragnar's hands on the wheel.
Other mistake: Lakella seems to disappear from the movie after the battle.
Continuity mistake: Liana is barefoot most of the movie yet at the chief's village she's shown wearing black ankle socks.
Revealing mistake: When the bully's held up by Sam wires can be faintly seen.
Factual error: The movie as the opening captions say, is set in Melbourne, Australia, 1978. However when Sam at the beginning of the movie drinks the milk and moves to the other room where the TV is, he passes by a poster (a communist party poster, the Italian communist party, strangely enough) that was designed only in 1981. (00:09:25)
Visible crew/equipment: As Abe Vigoda pronounces the last line of the movie ("Take care, my friend"), a boom mike pokes up in full view from the bottom right of the screen.