Factual error: Xander puts a load of those sticky bombs on a line of motorbikes outside the bad guy's house. These bombs had a detonator switch, which Xander has. When he eventually sets them off, the motorbikes blow up in the order that he put the bombs on. These bombs didn't have timers or anything on them, so why would they blow up one by one and not all at the same time? (01:09:50 - 01:20:30)
Continuity mistake: When XXX is snowboarding down the mountain in front of the avalanche his goggles change from round to rectangular back to round again. The snowboard also changes repeatedly - from red to blue - throughout the entire run. The tops and bottoms of the boards - when high or low angles are shown - are different for both boards, so you see 4 different colors.
Continuity mistake: When Triple X is brought to the diner, he has no jacket on. Later on in the plane, he's got a jacket on. When he's on that farm, the jacket is gone again, but when the raid is going on, he has got his jacket back. I don't know where he's always hiding his jacket, but it must be a really clever place to hide it. (00:12:30 - 00:22:30)
Revealing mistake: After X has put the bandaid explosives onto the motorbikes out the front of the compound, and is making an escape, he removes the bandaid off his bike and does a large jump over the castle wall. One of the bad guys is chasing him on another bike, and jumps the wall like X. As he is "flying" through the air, his long black trench coat remains hanging straight down. It should be flailing out behind him from his motion and the wind. (01:20:20)
Continuity mistake: When Yelena and X are on the roof of the building he's staying at and Yelena tells him "Remember what I said, after you kissed me? Never again. I lied.", the shot just before he kisses her she is wearing bright red lipstick, but the next shot it's clearly gone. Likely to spare X from red lipstick all over his face.
Continuity mistake: When Xander is snowboarding down the mountain to take out the communications tower, there is one point where the avalanche clearly bumps Xander and moves him ahead by about 12 feet. It appears to be a correction in the graphics so that it doesn't appear that the avalanche will outrun him down the mountain, however, poorly edited.
Visible crew/equipment: In the fifth shot of the amazing bridge stunt, an Arriflex camera with yellow cords hanging down from the camera is visible, off to the left of the screen. Also, in the same shot at the beginning of this shot (in the upper lefthand corner) you can see a guiding ramp setting the car to go off the bridge.
Continuity mistake: When XXX arrives at Yorgi's mansion, there are girls in the water fountain out front. If you watch Yorgi's large bodyguard, the one that sports 5 or so earrings and a large beard, you will notice that he takes a girl out of the fountain. A split second later the shot changes onto XXX and in the background the large bodyguard is seen taking the same girl out of the fountain again. (00:54:55)
Factual error: When Ahab is entering Prague on the river, an aerial shot shows it passing Palackého Square and the Slovanech Cloister, which would mean that it's coming from the South. Yet in the final approach to the bridge when XXX is riding it, it's coming in from the North, with the hill at Letenske Sady in the background. This is all a moot point anyway, since the Vltava river has at least 3 small, man-made falls along its path through Prague, complete with intricate and time-consuming lock systems for river traffic, so unless the Ahab could fly there was no way it could even get anywhere close to town.