Producers Alec Berg, David Mandell, and Jeff Schaffer bought a bootleg DVD copy of the film in March 2004, a month after the film's release and included some of its footage on the official DVD release as an ironic joke, (they had ripped off a bootlegger) and on the DVD they tell whoever pirated the movie "Fuck you, pirate!"
The kegs at the graduation party were filled with real beer. According to the directors, in the scene in which Cooper is thrown behind Scotty after the hot tub incident, Jacob Pitts is quite inebriated.
At the end of the deleted scenes/bloopers during the credits, the lead singer of the band playing "Scotty Doesn't Know" screams. The scream is from the end of Howard Dean's famous 2004 campaign speech.
The original text of the email Scotty receives Mieke actually says: Lieber Scott, Ich war ein sehr trauriges Mädchen, als ich hörte, dass deine Freundin Fiona dir den Laufpass gab. Aber vielleicht ist es so zum Besten. Ich war jedenfalls sehr froh darüber! Ich muss für nächstes Jahr eine grosse Entscheidung treffen. Und da dachte ich, da du ja jetzt keine Freundin mehr hast, könnte ich in die Vereinigten Staaten kommen und wir könnten uns besser kennenlernen. Vielleicht könnten wir ein Treffen arrangieren. Bis Bald, Mieke. Translated, this says: Dear Scott, I was a very sad girl when I heared that your girlfriend Fiona dumped you. But maybe it is for the best. I was glad about it, anyway! I must make a big decision about the next year. And I thought, that since you don't have a girlfriend anymore, that I could come to the United States and we could become better acquainted. Maybe we can arrange a meeting. Until soon, Mieke.
When the movie arrives in Germany, there is a white sign "automatische afsluiting" and blue sign showing a car being repaired. Both signs are not German, but Dutch. "Automatische afsluiting" means "Automatic locking".
During the end credits, the Amsterdam youth hostel owner (Joanna Lumley) indicates that a "fire that may occur due to the faulty wiring of the fireworks factory upstairs". She is referring to an actual dramatic explosion of a fireworks factory in the Dutch city of Enschede on 13 May 2000.
The trivia item below may give away important plot points.
Scottie's drunken email to Mieke (when he still thought she was a man) originally reads: "Listen Mike, I don't want to arrange any meetings with yu, you sik German fraek. I'M NOT into guys like you so pleas keep yor hands off of my Genitals and never right to me again and don'T come to AMErica. goodbye, fucface"