Continuity mistake: The next morning after going to Lido Pier, Marlowe walks into the waiting room of his office and Lauren Bacall is sitting there reading a magazine as she waits for him. The lighting on her changes and the picture on the wall behind her head is lowered about six inches between shots. (00:32:20)????
Continuity mistake: After taking Carmen Sternwood to her bedroom, Norris the Sternwood's butler helps Marlowe put on his over coat as he prepares to leave. Marlowe wasn't wearing it when he came into the house though and there's no indication that he had it in Carmen's car because when they left Arthur Gwynn Geiger's house he didn't have it on. (00:27:15)????
Audio problem: The second time he's in Geiger's house, Marlowe goes into several rooms and turns on a light switch as he snoops around. The light does not come on until a fraction of a second after the switch has been thrown, and the sound of the switch being thrown does not happen until after his hand stops moving. (00:28:30)????