Corrected entry: 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. The fancy accommodations they're in are most definitely not a hospital.
Corrected entry: In the scene where Scarlett kills the Yankee deserter on the stairs at Tara she asks Melanie for her nightgown to wrap the body. As the camera follows the nightgown to the floor and before Melanie hides behind a curtain you can see that she is wearing a flesh-colored bodysuit.
Correction: You do not see Melanie's body at any point, other than her calves, her shoulders and her head. In her autobiography, Oliva de Havilland recalls this scene and says that there was great excitement in the film crew as it was rumoured she was going to be naked under her nightgown. They were very disappointed - she was actually wearing a short sleeved top and rolled up trousers. No such thing as a "flesh coloured body suit" was worn by her.
You do see her body and a side glance of her bare breast.
Continuity mistake: When Scarlett undresses for her nap after the 12 Oaks barbecue, she unties a small bustle from around her waist. She didn't have this bustle on when Mammy helped her dress for the barbecue earlier that morning.
Suggested correction: Was it under the main bustle?
Scarlett is laced up then Mammy helps her on with her dress. Looks like Scarlett is just wearing her corset (stays) with pantalets. Selznick probably adhered to the customary undergarments in the nap scene but chose no film time for the hurried scene where Gerald counts to 10 to make Scarlett hurry down to his carriage.
Question: At the very beginning when the twins are talking to Scarlett it sounds to me like George Reeves says something about the "other 48 states" wanting war. Am I hearing that incorrectly? There were only 34 states when the war began.
Answer: To answer your question, I looked for on-line versions of the "Gone with the Wind" screenplay. What you are hearing as "other 48 states" is actually "those fool Yankees." The full line is, "Y'know, those fool Yankees actually want a war?" Also, the line is actually said by Stuart Tarleton, played Fred Crane, not by George Reeves as his twin brother, Drew. In writing, it doesn't seem they would sound alike. When I watched the opening scene of "gwtw" on YouTube (https://www.youtube.com/watch?v=ymbmvQJcLDc&t=6s), I can see how the error was made. I might have misheard it, as well, if I didn't already know what the line was from my research. Mr. Crane's enunciation is rather muddled.
Answer: I watched this scene several times on HBOmax, both with and without the closed captions. The line, spoken by Brent Tarleton (George Reeves) is: "You know, those poor Yankees actually want a war." It does sound like he says another word just before saying "Yankees," but it's so muffled that it's unintelligible and the closed captions do not record it. It could be "poor fool Yankees," but that's a guess.
Answer: In the version I am watching it is definitely Reeves' character who say the line, right after he tells Scarlett "War. Isn't it exciting Scarlett?" Then comes what sounds like what I posted. Is it possible there are different versions?
Correction: Construction of St Thomas' Hospital in its present site commenced in 1867 and was completed in 1871. Prior to that it was situated in Streatham, miles from its current location on the Thames opposite Big Ben and the Houses of Parliament. Since the American Civil War ended in 1865 Rhett and Bonnie Blue are standing in a building which may well have been a hotel, but certainly was not a hospital which didn't even exist at the time.
You apparently haven't watched the movie. Bonnie Blue was born well after the end of the war. In the London scene, the actress playing her is 4 or 5 years old. The hospital would definitely have been started and possibly completed at the time of that scene.