George pulls up to the front of the hotel to meet with Sir Leopold and he sees the detective standing out front looking away from the hotel. He sneaks into the hotel elevator keeping his eye on the detective not realizing the elevator has a glass front that faces the street and he turns around he sees the detective now looking at the front of the hotel. It could have been the detective was always looking at the front but they don't give that impression (not very clearly anyway) and besides if that was the case wouldn't he have noticed George sneaking into the front door as any good detective worth his salt would be watching that front door? The way it's shown is just a little confusing.
George begins to tell her his idea about the operation and tells her to sit down. Several things can be seen from the side shot on the desk in front of her as she sits. First, four piles of cards are face up with the rest of the deck face down in a single pile to the left of them. Her purse and the ashtray are above them closer to the far edge of the desk. Then when they switch to a front shot of her, things have changed. The denomination of face-up cards are different and the rest of the deck face down is now in two piles instead of one. Also, her purse and ashtray are now in line with the piles of cards, and not above them as before.
When George is sitting at the desk talking to the inspector and the shots keep switching back and forth, the ashtray next to Charlie's purse keeps popping in and out.
As Charlie and Bruce go down into the wine cellar she is at the beginning of the first rack while Bruce is already at the end of it. He then turns to the gated second room. The shot jumps a little and it's at a slightly different angle and as Bruce opens the gate Charlie is now walking around the end of the rack without her being shown walking up to the end.
In one shot when Laura Devon is racing over to Malibu in the vintage Rolls Royce, the film has been printed in reverse. The car's license number is shown backwards.
When George starts telling Charlie about his idea of going to Switzerland for a sex-change operation, she picks up some cards and starts constructing a card house on the table. As he is talking she is shown setting two cards on the three cards she has already formed a triangle with. It must have been taped together for the shot because it all moves as one piece when she bumps it.
When the irate husband shoots Charlie at the start of the film, he catches him going out of a porthole. The body then falls through the porthole and into the water, where witnesses see bubbles coming up from where he sank. But if those bubbles are not next to the boat, where the body should have fallen. Instead they are away from the boat meaning that the wounded, if not dead body, must have vaulted, flung itself out and away from the boat.
Sir Leopold's gun is equipped with a suppressor (aka 'silencer'), but the gunshots that are heard are from a weapon without one.