In Spider-Man one of the mistakes spotted is Peter Parker pulling on a backpack in one scene, and then in the next scene he isn't wearing it. And in another a smashed window seemingly repairs itself.
The mistakes have been reported to website www.movie-mistakes.com, but so far Spider-Man is only ninth in their top 10, well behind The Matrix with 146 errors.
Sequel planned already
But the mistakes haven't put off film bosses from giving the green light to a sequel, set to spin onto screens in 2004, and perhaps even a third film, scheduled for two years later.