When the man is seen waiting for the bus at the beginning of the movie, he is shown wearing light colored clothes and holding a dark jacket. When he gets on the bus and walks past the women, he is wearing dark clothes and carrying a light colored jacket.
When Henry and Georgette are seen in bed together, in the first shot, George is on the left side of the bed, and Georgette on the right. When he's shown having his nightmare, Henry is now on the right side.
In the first minutes of the film, Lee Remick with her daughter on her lap is chatting with an older woman next to her on the bus. She says she has to have her daughter take a nap, and puts the daughter on her left shoulder. In the next scene the daughter is on her right shoulder.
It's been posted in several places that the opening credits use the title song in the background when in fact neither the chords nor the melody are recognizable anywhere in the music until the last few bars at the fade out to the bus scene.
When Henry plants the china berry tree in his front yard he neglects to take it out of the tin can first, guaranteeing that it will never grow larger, and probably strangle to death.
Different takes are used in the china berry tree planting scene. Some shots look visibly more windy with the plant shaking violently caused by the strong wind.
Near the end of the film, right after Slim seats Georgette and Margaret Rose in his car, he closes the door and the camera along with the head of the camera operator can be briefly glimpsed in the rear passenger-side window; then in the next shot, as Slim is backing the car out, the entire crew, as well as their equipment, can be seen reflected on the driver side of his car.
At 2:11 as Slim is putting Georgette and the child in his car, a crew member's reflection is visible in the right rear window.
Henry digs a hole in his front yard to plant his Chinaberry tree, but he leaves the sapling inside the carrying can when placing it in the ground. This will prevent it from growing any larger, and quite possibly die.
When Henry is on stage he sings almost everywhere but into the microphone, yet the volume of his voice never drops.