Sophia enters nightclub in a lacy top with nothing beneath. In the next cut she has the lacy top in her hand, but now has a black blouse on where there was none before.
In virtually every scene where someone is walking through a crowd, the people around the main characters change from shot to shot.
When Joe is chasing Jimmy through the streets of Chicago, a helmet can be clearly seen on the driver of the red car (Joe's car) as it enters the tunnel. Both drivers are shown before and after without helmets on.
After the last race, Joe Tanto takes off his driving gloves, which are clean, and reveals dirty hands meant to be a result of the race.
In many scenes, the cars switch between a speedway wing setup and a road course wing setup within the same race.
Joe and Jimmy could not have taken the race cars from the party as easily as they did. CART cars do not have onboard starters, so they can't be started simply from the cockpit. You would need a crew member with a starter motor at the back of the car to fire the engine.
Most "racing cars" at shows and parties like this are usually dummy display models, without "real" engines or other heavy, and expensive, mechanical components. Moreover, if the cars actually had been authentic (and somehow could have been started), they likely would have had virtually no fuel aboard; most city fire departments have strict regulations on this for a show or display car, especially inside a hotel.
In the scene where the drivers are rescuing Moreno in the lake, flames are clearly visible on the water. Methanol fuel, as used by CART, burns with an invisible flame, and is water soluble. Water is actually the preferred extinguishing agent for methanol.
On several occasions, drivers turn the steering wheel sharply and at a significant angle at high speeds which would actually make the car start spinning.
The movie shows Juan Pablo Montoya as a CART driver and features a CART race in Germany. Montoya left the CART series for Formula One after the 2000 season, while the first CART race in Germany was held in 2001.
When Jimmy Bly moves to the 7th place in the final race, he slaloms through a group of cars that, instead of trying to block him, nicely move out of his way. Also, the room that the last two of these cars leave him towards the wall is not wide enough for another car to fit through.
One of the "photographers" at the media event is taking photos without a lens attached to his SLR camera body.
When Tanto does his quarter trick, the quarters are pressed into the tires seem to be in good condition. After being driven on, the features should have been abraded by the road surface making them look like blanks instead.
When they park the cars after the last race, the tires on the car in front are new with no wear at all.
Another U-D-R-L religious cross. When one makes the cross across one's body, it is forehead, stomach, left chest (heart) and right chest, or up-down-left-right, not right-left.
During the first race at Chicago, we hear Paul Page, a well known CART and IndyCar commentator, describing the race. However, the following shot of the TV booth shows two men, neither of whom is Page.
Some of the racetracks are clearly doubling as others on the tour, and even when the correct location is used there are often obvious hints that some shots were taken elsewhere. Some shots of "Tokyo", for instance, are very obviously of Chicago and Toronto, and yellow cabs can be seen in Germany where taxis tend to be eggshell colored.
At 1:36:22 the announcer says Bly is lining up in the 26th pole position because he didn't qualify. There is only one pole position, awarded to the fastest qualifier. Remaining drivers are part of the starting grid or starting line up.