Corrected entry: The framed thieves communicate between themselves in Polish. Later on, they are supposed to be Romanian.
Corrected entry: When the sprinklers in the museum go off, the water should (at least initially) be brown from the rust that accumulated in the pipes.
Corrected entry: Thomas Crown puts the Monet back at the ceremony when he first meets Catherine. It isn't until even later that he mentions her not being allowed to play poker. Yet the "ghost" underneath the fake painting she steals from his house is "dogs playing at cards." This makes no sense - unless he had a second fake made, from the first one?
Corrected entry: During the search of Crown's house, the helpers are told to search the basement first, and they immediately begin to search the first floor. (00:54:55)
Corrected entry: In the scene where Thomas Crown places the briefcase which eventually stops the gate from coming all the way down, he places it right up against the wall of the entrance but later it can be seen that the briefcase has stopped the fence a few centimeters away from the wall. Who moved the briefcase?
Corrected entry: Every time you see the outside of the art museum, the banners hanging down are different.
Corrected entry: The art gallery is conveniently fitted with heat sensitive cameras. However, this would not be sensible in an art gallery, as infra-rad cameras cannot make distinctions such as precise facial features, necessary for identifying a thief.
Corrected entry: When Katherine arrives at the heliport and is rushing to the landing pad, the heliport employees tell her that she cannot go on the pad without an escort. She ignores that warning and goes out anyway, where Crown's representative is standing. The heliport employees apparently allowed him on the pad without an escort and made no effort to go get her after she ignored their warning.
Corrected entry: At the beach house, she goes out back with a towel around her neck as though she is going to get wet, but where? The beach house is on top of a mountain, far from the beach and there is no swimming pool. How did Crown and Catherine get to the beach?
Corrected entry: While dancing in a see-through dress, the frontal view shows she is wearing full-sized panties but when she twirls around, they're gone .
Corrected entry: Just after the group in the museum realise that the Monet has been there all along, someone realises that another painting is gone and makes some comment to the effect of "Look at this." The camera pans to the second painting, where the protective wall is just beginning to open and reveal that another painting is missing. Thus, the person who pointed out that the second one was gone could not have known that it was indeed missing. Also, why was the wall opening - the ceiling was still dripping from the sprinklers and opening the walls no doubt requires pressing a button in the central control room.
Corrected entry: When Crown crawls under the gate to steal the Monet, he puts on a surgical glove which we never see him remove, although we see all of his movements from when he enters the gate until he exits (he's not wearing the glove at the exit).
Corrected entry: When Russo first approaches Brosnan on the dance floor she is wearing a black dress that is opaque, when they start dancing it is suddenly very transparent.