Factual error: The Swedish girl Ulla keeps saying "God dag, min vännen" as a greeting. Problem is, the grammar is incorrect. "God dag, min vän" means "good day, my friend". "God dag, min vännen", as Ulla says, means "good day, my the friend". "Vännen" is the definite article of the Swedish word for "friend".
The Producers (2005)
1 factual error - chronological order
Directed by: Susan Stroman
Starring: Will Ferrell, Matthew Broderick, Uma Thurman, Nathan Lane
Continuity mistake: When Max Bialystock is singing "Along came Bialy", and the old ladies start coming out of the apartments, the first lady who comes out isn't there in the next shot.
Leo Bloom: We might have a position for you.
Max Bialystock: As a matter of fact, we might have several positions for you.
Trivia: Mel Brooks "composed" the music for the Broadway show (which would go on to become this movie) by humming tunes into a tape recorder. Someone who was musically literate would then write it down on staff paper.