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)????
Continuity mistake: Lauren Bacall takes Marlowe's handkerchief out of his jacket pocket and she begins to wipe off the water that Mona Mars threw in his face. He stops her and says, "Never mind, Angel, the water feels good". She puts the handkerchief back in his pocket, but two shots later it's not there. Then at the end of the scene, it reappears again. (01:39:15)????
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)????
Continuity mistake: In Joe Brody's apartment Marlowe says to Lauren Bacall, "Don't argue with the man, do as he says, sit down". She sits down on the right side of the couch next to the pillow and never moves from that spot, but several shots later in a wide shot she's sitting in the center of the couch. (00:50:00)????
Other mistake: Earlier in the movie at Geiger's house, Marlowe calls Chief Insp. Bernie Ohls of the District Attorney's Office and the six digits of Bernie's phone number are 122-145. At the very end of the movie,, he's with Lauren Bacall at Geiger's house and again calls Bernie Ohls. This time he dials the same phone at the DA's office but leaves off one digit, calling 12-145. (00:59:55 - 01:52:10)????