Revealing mistake: When Scarlett finds Twelve Oaks completely destroyed, the carriage in the background is not real. As Scarlett walks toward the staircase, both the carriage and Prissy are not real, it is just a picture that has been painted to make it look like they are sitting there.
Revealing mistake: After Frank Kennedy's death Scarlett is sitting in her room, "mourning" and drinking. When she hears Rhett's carriage she goes to the window. In this moment you see shadows, either from crew members or equipment, cast through the room, especially visible on the bottle on the table. There is also some funny shift of the backdrop outside the window. (00:55:35)
Continuity mistake: When Gerald O'Hara comes back from his afternoon ride he meets Scarlett in the fields. In the middle of the conversation, while they are walking along, the formerly bright sky all of a sudden turns to a dusky red, and Scarlett has a new hairdo that covers her ears. (00:11:20)
Factual error: When Atlanta is in chaos, there is a shot of a fire engine rushing down the street. Two shots later is a wide shot of the street with a giant red and white radio tower visible in the distance.
Continuity mistake: In the scene where Bonnie and Rhett have just arrived back from London, Bonnie runs up the stairs to greet her Mom, arms flying all over the place. In the next shot, Bonnie is holding the kitten that Rhett bought her.
Continuity mistake: When Scarlett is attacked in the woods, Big Sam drives her carriage out of danger. When the scene cuts to a far shot of the carriage driving through the woods, Big Sam is no longer with her. She is driving it by herself.
Continuity mistake: When Scarlett sees Frank Kennedy while she's working in the hospital, there is something on the left side of Frank's face in the close up shot of him. In the next shot that shows Scarlett and Frank, it is no longer there. (01:03:55)
Factual error: Almost every crock in the background in this movie was made after 1920. I also saw clear, machine made jars. The automatic bottle machine was invented in 1901. Canning jars were crudely made and rarely ever clear in the 1860's
Continuity mistake: At the beginning of part 2 Scarlett walks by her sisters who are working in the field, carrying two water buckets. They start arguing, and Scarlett slaps Suellen, without any indication that she had put the buckets down. In the next shot we see her bending forward to pick up the buckets again. (00:03:10)
Revealing mistake: There is a very short scene in the second half of the film where Mrs Meade and Dolly Merriweather are sitting at a tea table gossiping about Scarlett's behaviour. There is a teapot in the middle of the table, and Dolly Merriweather is sitting behind it. Yet the teapot is casting a shadow on the wall and Mrs. Merriweather isn't.