Visible crew/equipment: After the moving candle/ghost incident involving Ferdie and Camille, and before Moose Matson's money is discovered, Chuck and the doctor come running in, and they all start yelling and talking, there is a person (probably a crew member) briefly visible in the round window in the door in the background.
Hold That Ghost (1941)
1 visible crew/equipment mistake - chronological order
Directed by: Arthur Lubin
Starring: Bud Abbott, Lou Costello, Richard Carlson, Joan Davis
Audio problem: After Moose Matson is shot in the cop and car chase, Moose Matson, says, "Pull over, will ya?," but his mouth isn't moving.
Ferdie: Oh a bed, that's just what I need, a nice big bed to hide under.