Continuity mistake: After Mortimer picks up Elaine and literally throws her out the front door, he locks it to make sure she doesn't just open the door and walk in again. When Aunt Abby goes to open the door for Mr. Gibbs less than a minute later, she doesn't have to unlock it.
Continuity mistake: When McMurray enters his office at the start of the film, he places his hand on the table and sits down. The position of the hand is different between shots.
Continuity mistake: When the maid is out on the street calling a cab, the policeman shows up. The distance between them changes from close to farther away, between shots.
Continuity mistake: When the lodger is looking down the stairs at Daisy (who has just been handcuffed as a joke), his body faces the railing in one shot, the wall in the next, then the railing again.
Continuity mistake: Dick Powell puts his gun in his left trenchcoat pocket and then 2 minutes later takes the same gun out of his right pocket.
Continuity mistake: The postman walks into the tavern as the bell tolls. When he sits at the table with the others, everyone changed position at the cut. The bearded man had his hand on his glass, and now it's gone, and the priest's hand was not on the table, but then it is. (00:02:15)