Continuity mistake: When Burt Reynolds and Goldie Hawn are left alone to write the final scene to a movie, Goldie says she needs air, so Burt takes a trash can and breaks out a window. In the next shot, more of the window is broken out than was shown previously.
Continuity mistake: Near the end of the film when Jessica Lange, playing Frances Farmer, runs away from her parents' home in Seattle, Washington and takes on the life of a vagrant. She is seen hitchhiking on a road, which is obviously adjacent to a desert and looks very much like southern California. When the police pick her up and drive her back home, in what seems like a short period of time, she is transported back to the Seattle landscape surrounding her parents' home.
Factual error: In the early part of the film Al and his daughter are watching the television and waiting for a car race to begin. During the dialogue you can hear in the background the announcer refer to the Long Beach Grand Prix. Then the start of the race is shown with grass covered hills in the background. The Long Beach Grand Prix was and is a city street race with no grass hills in the downtown area. (00:10:45 - 00:11:35)
Continuity mistake: As Garp is being placed aboard the helicopter, the rotor motor can be heard spinning, but there is no downdraft affecting the people in the scene.
Continuity mistake: In the very last scene of the film Paul Newman ignores the ringing phone with Charlotte Rampling on the other end. A wide shot shows a paper coffee cup is on a table to his right, in front of the plastic lid. In close up, he reaches right, picks up the cup from out of shot, drinks from it and, judging by his arm positioning, puts the cup back in the same place. The next, and final, shot of the film is wider angle again. The lid is there, but the cup is now missing.
Plot hole: We learn in the film that Cat People must kill a human in order to return to their human form. However, after becoming a cat at the swimming pool and terrorising Alice, Irena becomes human again without making a kill (the only other person at the closed pool is alive and well at the end of the scene - we know Alice has not imagined the presence of the cat because of her shredded clothes). (01:31:00)
Continuity mistake: When Kenny Rogers gets trapped in the rest room at the beginning of the film, he pulls the knob out from the door. When this happens, the knob is on the left side of the door from his point of view. After he climbs out the window, the door has changed to having the hinges on that side and the style of the door does not look like it has a knob at all. A rest room this size would only have one door, so it has to be the same door.
Revealing mistake: The actors all have the speed, form, and physique of high school athletes- not people headed to the Olympics.
Character mistake: A newspaper headline is prominently displayed "No Clues in Lindbergh Kidnaping" - blatant misspelling.
Plot hole: Frank Ochoa told miss Nicole that Paul killed 9 people in New York when in fact he killed 10. (00:47:00)
Factual error: At the beginning all the children sleep in the same room on Christmas night. On the wall in the room, next to the door, hangs a string with five different kinds of small cross flags, including the Swedish and Norwegian flags, which are correct for the era, but also a white flag with a blue cross on the string, even though this is almost a decade before Finland would declare independence.
Visible crew/equipment: When the plane drops the grenade into Halicki's car, and he throws it through the sunroof, it blows up the car tailing him. In the slow motion shot following, the stuntman's crash helmet is visible. (00:50:00)
Continuity mistake: In the prologue, the boss of the bad guys approaches the window. Notice the tree casting a large shadow. He whispers "Jessie, try the door", and in this close-up there's a lot of light and it's his hand and head to cast a shadow on the wall. (00:03:15)
Continuity mistake: John is helping Mr. Nardini at the beginning of the movie. The box breaks right away and spills its content on the doorsteps, and the various items (pay attention to the blue bags of pasta for instance) shift position at every cut. (00:03:50)
Continuity mistake: When "Bruce Lee" is fighting the bad guys after he catches the poker cheater, there are multiple continuity mistakes; the bad guys are knocked atop the tables in the room but they disappear and reappear from those tables between shots.