Revealing mistakes: The safe the gang robs has an electronic-eye-alarm along the wall which must be avoided or else the alarm would sound off. Everyone avoids this alarm in the scene except for Dix, who is clearly standing in its way when the gang converses whether they should stay to finish the job or leave prematurely.
Miscellaneous: A publicity photo for the film showed Dix between Doll and Angela, who desperately tries to get him to turn away from Doll. Angela and Dix never meet in the film.
Revealing mistakes: When Mr. Ciavelli was inside of a long narrow tunnel. He chisels through the thin brick wall of the tunnel and goes inside of a room, and along that same wall is a door leading upstairs. On the other side of the wall, there was no evidence of a door.