Continuity mistake: As he sits tied up by the couch, Marlowe says to Lauren Bacall, "Take this thing out of my mouth," and his entire face is wet with the water that Pat Clark threw on him. In the next shot as she takes the cigarette out of his mouth before they kiss, his face is almost dry (1945 Version on DVD). (01:42:15)????
Other mistake: Marlowe tells Lauren Bacall to start screaming in 20 seconds after he leaves the room, she does and Lash Canino is outside and hears her. He runs into the house and if you look closely the prop porch railing almost falls over as he runs by because the crew did not attach it properly. Later we see it again and it's attached properly. (01:41:35)????
Continuity mistake: When we first see Harry Jones' body lying on the floor his shoulder is even with the split in the two cushions on the left of the couch. In the next shot we see him again lying there and his dead body has moved six inches to the right in relation to the cushions on the couch. (01:32:25)????
Continuity mistake: Marlowe walks into Art Huck's garage and Lash Canino says, "You got time to fix his tire?". Canino doesn't move an inch in the 12 seconds between the two shots were we see him but all the stuff behind him is rearranged. Most notable is the lamp used to dry the automotive paint, which if you look at its label, has been rotated 180 degrees without any one going near it. (01:35:45)????