At the beginning of the film at the breakfast table, when the toast pops out of the toaster and startles the maid, the bread is white in close-up. Then in the next long shot Mrs. Babbitt takes the toast out of the toaster and it's burnt black.
Early in the film, as George comes down the stairs his tie is under his vest. But as he signs for the telegram and talks to his wife, his tie is outside his vest. Then as he goes into the breakfast nook, his tie is back under his vest.