At the Vicker mansion, after learning that George is suspected of murdering Alice, Angela is escorted to her room by her mother and Lulu the maid. Angela collapses on a large oval hooked rug.
Just as the camera pans to her mother you can see the open space in the mirror to the left where the camera is filming from outside the room "through the wall" and into Angela's room.
Alice Tripp is wearing different shoes when she starts walking home from the movie with George Eastman than she is when they are close to where she lives. When Winters pointed out to director Stevens that the brown and white shoes she was wearing turned to black when she walked around the corner, the director refused to reshoot the scene. According to Winters he said, "If they're looking at her feet I can go home."
Shelley Winters said that the walking scene had been filmed from twilight to midnight, and her feet hurt, so she changed shoes during a break. When they saw the rushes the next day, everyone noticed the change, but the director said, "If they're watching her feet, I might as well go home. We are not redoing the scene."
At the party at the Eastman house, George is shown talking to Angela right next to the billiard table. George holds a billiard stick in his hand. Then Mr. Eastman comes into the billiard room, and simultaneously George turns to greet him, but suddenly the billiard stick is not in his hand at all, but is now lying on the billiard table.
During a one-on-one conversation between George and Mr. Vickers, George explains his family background and why he wishes to take care of Angela. He is clearly seated to the left of Mr. Vickers. Several close-up reactions reveal Mr. Vickers speaking towards his right side.
At the beginning of the seduction scene at Alice's apartment her radio is playing a quiet samba tune. Yet when the volume is accidentally bumped up, the song turns into a brash college fight song instead of a louder version of the samba. Once George turns the volume back to it's original level the fight song disappears and the soft samba magically returns as well.
In the scene in prison when George is supposed to walk the last mile, the warden asks him to come out, and there is a long pause. There is someone walking by in the background who clearly begins walking in slow motion for the duration of the pause, then resumes normal speed. Clearly, the shot of the warden standing there was extended by putting the film in slow motion.
When George stays overnight at Alice's house it's raining very hard. They drive over in his convertible with top down and it stays down all night. This is not part of the plot and not mentioned in any way.