Continuity mistake: When we see the police officer checking the hit counter on an adult web site, the hit counter goes down from 1,739,986 to 1,739,944 a few seconds later.
Continuity mistake: When Alex sees the cop hiding in the shower on the camera/web server towards the end, the hit counter is at the same level as it was earlier in the film (despite increasing steadily every second when we last saw it). Plus the mouse cursor is slowly moving up from "Camera 3" to "Camera 1", despite Alex not moving the mouse. (01:12:55)
Continuity mistake: In the scene where Alex has just risen from the dead and escapes from the prison through the roof, there's a close up on him. His hair is much shorter in this shot then it was a few seconds ago. Then when he jumps down, his hair is longer again. This happens at least once more later in the film. (00:15:20)
