Corrected entry: In the party scene, where Jake is being shown the lakeside brawl, Max incorrectly states "force times mass equals acceleration". The correct formula is force equals mass times acceleration. (00:19:20)
Corrected entry: Throughout the film several students are seen handling iPhones in ways which iPhones simply do not work. When Tyler walks down the halls of his Orlando high school for the first time, a girl is seen watching a YouTube video of him holding her iPhone in portrait mode (iPhones and iPod touches only view videos in landscape). Later, several students are seen video recording the fighting matches, a feature which iPhone does not have.
Correction: You can Jailbreak an iPhone and take videos. Also, the landscape\portrait "mistake" was probably a video from some site other than YouTube.
Correction: This is a character mistake, one that could have been made for any number of reasons.