Character mistake: When Charlie is calling out the brick count to Napster from the subway, he describes it as being "13 across, 4 high, 4 deep". The bricks appear to be 2 deep in the safe (13x4x2), so he could just be lumping two shelves together, which works (13x4x4 = 13x4x2x2). The problem is that when the camera pans down there are 3 shelves in the safe. This means that there are more than the 208 bricks that Napster announces. (01:33:40)
Continuity mistake: In the getaway scene after Charlie leaves Stella and Handsome Rob to go after Steve, Napster says take the next left and you see the Mini's number plate which reads 2SBI658. When he skids narrowly missing a truck it now reads 2SAQ321.
Factual error: The group is plunged into the icy water for at least several minutes wearing nothing but light jackets yet no one seems to be suffering from hypothermia in the slightest when they show up on shore. (00:21:30)
Continuity mistake: When the Mini Coopers enter the subway tunnel, the white Mini is bumped by the train, yet in the following scene and the rest of the movie no body damage is visible to the rear of that Mini. (01:27:45)
Factual error: Even a minor low-speed impact of a motorbike that heavy into a car door would damage it so badly that it would look different than shown on the white Mini - if the door were still there. Most certainly the glass would be shattered and the door could not be closed. (01:36:30)
Audio problem: When Mashkov's men grab Steve, you can hear him say "Come on, Charlie", but his lips aren't moving at all. (01:39:35)
Factual error: The crew sets off explosives so the armored truck will fall through the street into the subway tunnel. In reality, the subway tunnels underneath Hollywood Blvd are about 6 stories underground. That means the truck would have to fall through approximately 80 feet of concrete, soil, rock and more concrete to fall into the tunnel. (01:29:15)
Continuity mistake: When the blue Mini is driving through the streets, there is a dent on the rear wing on the passenger side, but when you see the car drive into the train, the dent is no longer there. (01:37:00)
Continuity mistake: When Stella and Steve are on their date and Stella says "you're just gonna have to wait and see" you can see Steve holding his hand up. When it cuts to Steve his hand is down. (01:07:40)
Revealing mistake: In the chase scene in the subway, Napster stops the subway train at the end of the tunnel to block the tunnel entrance. When you see the view on his laptop, the train station CLEARLY has a metal railing. There is no such railing throughout the rest of the scene. (Yes, it's likely while filming that railing was removed to enhance the scene then put back.) (01:27:45)
Revealing mistake: When Edward Norton takes Charlize Theron out to dinner, the mustache on the right side of his mouth is further away from his lip, than on the left side of his mouth showing that the mustache is only stuck on.
Continuity mistake: During the flashback to Charlie's childhood, immediately before the kid gets his book slapped out of his hands, the book is open. When it cuts, some of the pages are suddenly sticking up. (00:31:15)
Continuity mistake: In the sequence where the three Minis are being driven around a waterway as a rehearsal for the job, the auxiliary driving lights (the ones fixed in front of the radiator) go off and on. In the first shot all the cars have these lights on, in the next external shot the white car has them switched off, then back on again for the immediately following shot. Shortly afterwards the red Mini has these lights off for one shot - then back on in the very next one. (00:58:15)
Visible crew/equipment: In Venice, when they enter the house, the camera crew is reflected on the windshield of the boat. It is very obvious. (00:08:00)
Continuity mistake: When the armoured truck begins to fall into the subway, the above ground shot shows the truck tilting forward as it falls. The next shot from the subway shows the truck falling exactly horizontally.
Factual error: When Mark Wahlberg is a child, he steals a wallet with bills sticking out. The bills are large head print, not possible in that time period. (02:10:10)
Continuity mistake: In the scene where "the Napster" is changing the street lights, there is a shot where armored truck 128 is slowly moving behind a grey or white Saturn (right after you hear on the radio "Truck 128, what is your progress?"). In the next shot, where one of the men in the truck says "Ah, get us outta here," you see Napster's computer. On the computer, when you see the street camera looking down onto truck 128, the Saturn is gone and all the surrounding traffic has moved. Truck 128 is one lane closer to the curb, and the car and SUV that were on 128's right in the live shot appear to be to the truck's left on camera. Other cars are gone or have changed places as well. (01:24:55)
Continuity mistake: When Lyle and Charlie are arguing about calling him 'the Napster', note Stella Bridger in the background. Her cup goes from chest height to down on the table. (00:53:10)
Continuity mistake: When it is revealed that Steve has hired some armored cars, Charlie tosses a basketball to Lyle, even though in the previous shot Lyle was already holding it.
Factual error: Pilots always use the established phonetic alphabet to give registrations or information. Steve's pilot says, "3 Kilo Bob". He should have said "3 Kilo Bravo".
Answer: They are flying the Italian Civil Ensign, which is used by civilians on water. The emblem in the center of the Italian flag when used on water are the Arms Of Savoy, the former royal Family of Italy.