Continuity mistake: When Butch crashes and Marcellus shoots the woman, there's a second woman next to the door, and a white cup next to her. In the wide shot the cup is gone.
Continuity mistake: After Fabienne asks Butch about his hard day at the office, Butch turns away from the hotel room window and starts walking towards the bed. But in the next shot his head is facing the window once again. (01:15:55)
Chosen answer: Tarantino is big on tribute to older films and filming techniques, hence the projection-style background.
Captain Defenestrator