Continuity mistake: In the opening scenes where he gets his mustang back, he hits the guy who comes over the roof and busts the windshield, but in the very next shot the windshield is pristine. (00:07:45)
Continuity mistake: When Yossi Ghinsberg falls from the plot to the river, he swims to left bank of the river (you can see the water flow from right to left). Afterwards he stayed on the same bank of the river. But later we see him to look down to the river from the right side (water flow is from left to the right). How did he get there? (00:52:25 - 01:14:23)
Continuity mistake: Towards the end of the movie the main character is shot in the thigh. In the next scene (the end of the movie) the character is seen holding a wound to the stomach - his thigh wound having disappeared. (01:24:00 - 01:30:00)
Factual error: In a picture from the UN headquarters in New York in the year 2003 you see two German flags. The German Democrativ Republic hasn't existed since 1990. (01:16:04)
Plot hole: It seems highly unlikely that Lucas would be able to "mess with" Mr. Butler's application for a professorship position, or be able to accomplish what he did in such a short amount time. Off-screen, Lucas went into Mr. Butler's briefcase (foolishly left on his desk in the classroom during lunchtime) and (correctly) assumed Mr. Butler's application was on his laptop. Lucas would have to be able to figure out Mr. Butler's password (something that could take forever), find the right file on his laptop, read or scan the application to determine what he could do to mess it up, write a new answer for "qualities that make me a good teacher", and leave the classroom before anyone saw him. Lucas would also have to assume that Mr. Butler would not notice the change when he printed the application, made a photocopy, and double-checked the application before inserting it in the envelope and mailing it.
Plot hole: Buddy is seen at the end of the movie going on the bus that will be featured in Jeepers Creepers 2. When the students and staff encounter the Creeper why didn't he inform anyone that he had encountered the Creeper earlier? The only person that seemed to know anything was one of the girls having a premonition.
Continuity mistake: On the third and fourth day, Carter's roommate shows up earlier than the first 2 days. And Tree's suspect tips notebook every day don't reset and the line and erases are the same.