Whoever was in charge of continuity on this film was working too fast and/or too furious. All of the action takes place within about a week's story time, yet there's a telegram dated July 12, a steamship ticket dated August 9, and a two-month wall calendar for October/November.
At about the two-minute mark, Garda takes off only one glove and then picks up a magazine, but the close up of the hands holding the magazine are both glove-less, and when she puts down the magazine the glove is not on her hand.
When Garda reads the telegram from Travers, she is holding it with only her left hand. But on the next cut which is a close up of the telegram; she is now holding it with both her hands.
When Connors is in Police Chief Miller's office, he is smoking a cigarette with his left hand. But on the following cut, after Lily Cole walks in, he is now holding the cigarette in his right hand and also smokes it with his right hand.
When Lily Cole goes into the bar with Jerry, she sits down at the booth with her right arm folded over the left. But on the next cut; the orientation of the arms has changed and the left arm is now folded over the right.
When Garda is trying to make the office hotter, she uses a cigarette lighter to raise the thermometer on the thermostat to 103 degrees. But raising the thermometer should cause the thermostat to shut off the heat in the room.
When Sam approaches Joel and Garda on the beach, there is a projection in the background of beach-goers . However, the action being projected continues to repeat as if in a loop.
As is typical of the era, and MGM in particular, it's 103 degrees and everyone is dressed to the nines--but there's not the slightest drop of perspiration.
When Sam and Joel are riding the elevator, the floor indicator light starts blinking incessantly when Mike keeps pressing the button and banging on the elevator door. But since it as an automatic elevator, the floor light would not come on when someone on the building floor presses the button or bangs on the elevator door.
When Joel is confronting the lions, the lion at his feet with its back to the camera is obviously a fake. Also, when he shoots toward the lions they are obviously a rear-screen projection.
Right at the beginning of the film when the man selling papers yells "and I don't mean maybe", his lips aren't moving.