Continuity: When Alan and Francis part company, they are initially right next to each other, but then at arm's reach.
Continuity: There is an inconsistent positioning during the struggle on the bed between Cesare and Jane.
Factual errors: Although Cesare is described as being a somnambulist – that is, a sleepwalker - he actually appears to be a narcoleptic, someone who has seizures in which they appear to have fallen asleep.
Miscellaneous: In most prints, many of the shots have a bar across the top of the frame resembling the bottom edge of the same frame. This flaw may have been present in the original version.