Visible crew/equipment: When Mammy catches Scarlett trying on a pretty bonnet when she is supposed to be in mourning, when the camera pans wide to show the room, in the mirror on the wall behind Scarlett you can see the shadow of the grip holding the mic above Scarlett.
Continuity mistake: After Frank Kennedy's death Scarlett is drinking in her bedroom. She takes his picture, which is standing on the dressing table, and turns it on its face. In one close-up shot this picture is placed on a piece of lace, in all others not. When she finally leaves the room the picture is gone completely, and also all other things on the dresswing table are rearranged.
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.
Revealing mistake: After Frank Kennedy's death, Scarlett is drinking in her bedroom, when she spies Rhett arriving outside her window. She then races to the mirror to brush her hair. She does not actually touch her hair with the brush strokes, probably so as not to disturb her hair, which had been specially styled by hair and makeup staff.
Continuity mistake: In the scene where Scarlett shoots the Yankee deserter, look at the large window at the top of the staircase. Not only is the glass strangely opaque, but there is the silouhette of a tree being cast on it from a tree which is obviously directly outside the window. When Melanie opens the window to call out to Suellen and Carreen, the tree is not only about 15 feet from the window, its also significantly shorter than you would expect from its shadow. In fact, it comes nowhere near as far as the window ledge, let alone the window itself.
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.
Continuity mistake: The morning that Rhett leaves for London, he tells Scarlett to get Bonnie's things packed right away. Scarlett pushes herself up into a sitting position on the bed with her arms, but in the very next shot, she's laying back against the pillows with her arms crossed. Then she pushes herself up again.
Continuity mistake: Scarlett, Melanie, and Mrs. Meade leave the hospital when Belle Watling approaches them to donate some money. Throughout the scene the three women are standing close to each other, but when Belle drives off Scarlett is standing by herself even though the camera does a scan around her.
Continuity mistake: In the scene where Bonnie dies, Scarlett is sitting down drinking a cup of tea. She puts the cup on the table and stands up. When we see the next shot from behind, the table is clearly visible and the cup is gone.
Continuity mistake: In the scene where Gerald gets on his horse to chase after Jonas Wilkerson, Suellen and Carreen run outside to see what is going on. The door is left open when they come out, but in the next shot that shows Scarlett yelling for Gerald to come back, Suellen and Carreen are no longer outside and the door is closed.
Revealing mistake: When Rhett picks up newborn Bonnie from her bassinet, you can see that he picks up a doll, not a real baby.
Audio problem: When Ashley leaves the house to go to the train station after his Christmas furlough, there is a shot of Scarlett at the window, watching him walk down the path. We hear her say, "When the war's over, Ashley. When the war's over", but visually, her mouth movements do not correspond to what she is saying, at all.
Continuity mistake: When Scarlett is talking to Melanie before she dies, Melanie's "widow's peak" is obviously painted on.
Revealing mistake: If you look closely at the lily Scarlett is holding in the very first scene of the film, you can see that it's artificial.
Factual error: In the very short scene in "London" between Rhett, Bonnie Blue and the nanny, Big Ben is visible outside the window, with the Houses of Parliament on its left. In order to have this view, the room must be inside St. Thomas' Hospital.