Some of the calls that Kari gave to Helen in the movie are omitted.
Kari plays Mozart music for Jack-Jack. In the movie, Kari states to Helen that "Mozart makes babies smart." while holding a Mozart CD. Listening to Mozart or classical music does not enhance intelligence.
Syndrome states to Kari that the "S" on his shirt stands for "sitter". The "S" on his shirt stands for "Syndrome".