Factual error: Angela Bennett finds the Praetorian's IP while using the PC in the Cathedral's bank: it's 23.75.345.200 - they want us to believe that this is an IP, but no IP can contain numbers greater than 255. [Common practice, like fake phone numbers, but still worth noticing].
Factual error: Sandra Bullock uses her laptop computer to do word processing but when you see a close-up of the screen the program in use is a spreadsheet.
Factual error: When Angela receives the diskette and calls Dale, he's reading from his monitor that she received the package 3 minutes ago. His screen lists the tracking activity of the package, but only with a time, not a date. Tracking a package without the date would be pretty useless for an international courier like FedEx, which can take days for long trips. (00:12:30)
Factual error: When Angela Bennet comes out of the hospital, the Mexican hotel clerk checks the computer and tells her she's checked out and therefore has no room to sleep in. Although set in Mexico, the message on screen says "Ha salida". This translates to a jibberish "She exit door". The correct translation is "Ha salido". "She exited" or "She left".
Factual error: When Angela is leaving to go the Mexico, right after the computers are fixed, you can see some guys in US Army uniforms in the background. They have both officer insignias on their lapels, and NCO insignias on their shoulders. You can only be one or the other.
Factual error: When Angela first gets the disk from Dale, he tells her to click the little icon in the corner and hit control, shift. But then she hits control shift first then clicks the icon. This would be recognized very differently by the computer and generally makes no sense to hit modifier keys after an action.
Factual error: When the police are chasing Angela on the highway, the rain is running straight down their windshield. In reality, raindrops are pushed up over the top of the car by the airstream. In the same way, rain on the side of the car is blown toward the rear, but the shots of Angela driving show the rain running straight down the driver's side window, as it would if the car were sitting still. (01:14:45)