Trivia: After Thomas has stolen the first painting and is coming out of the museum main gates, you can see a balcony in the background with a man in a bowler hat and suit standing on it. A clue to viewers who notice it maybe?
Trivia: Not strictly a mistake, but have you ever seen anything like the product placement when Rene Russo storms into an office and downs a can of Pepsi One (with the label cunning facing the camera)? She does all but turn to camera, hold it up, and say "aaah - there's nothing like an ice-cold can of Pepsi". I actually laughed when I saw it.
Trivia: Not a mistake, just to notice: Thomas Crown (Pierce Brosnan) uses the name Jimmy more than once. First, he refers to his chauffeur by that name; next as he walks into his office, he calls out to another employee by that name; later in the film, even a security guard is called Jimmy. [Maybe a bit of observation; it used to be not uncommon for Glaswegians to call everyone 'Jimmy'.]
Trivia: The large delivery truck that almost hits Thomas Crown at the very beginning, as he walks across the street to the museum, is actually the same truck that is carrying his "Trojan horse" to the museum. The driver and license plate are the same (PB9975). In line with the theme and use of the Greek "Trojan Horse" is also the idea of a Greek tragedy; that he (Crown) would be killed by the very truck he hired to carry out his heist; felled by the very events he put into motion. An important part of Greek tragedy is hubris which is shown prominently in Thomas Crown. (00:02:45 - 00:05:10)
Trivia: The actual glider used in the movie was a "Duo-Discus x" manufactured by Schempp-hirth and was the personal plane of millionaire Richard S. DuPont. The gliders sold new in 1999 (when the movie was made) for about $100,000. The DuPonts, besides being chemical giants, were pioneers in American gliding. (01:06:00)