When Richard asks the confessional what 'Milwaukee' means, it eventually tells him it's a rare mineral found in the river. Later, he tells Lena the confessional said it was a plant found in the ocean.
When Richard runs from the man on the motorcycle, he steals a bicycle with high handlebars and a step-through frame. In the very next scene, the bicycle is a BMX-style bike.
While Richard is reading the file on the man he was cloned from the city of birth is listed as "DeMoines." The correct spelling is "Des Moines."
At the start of the foot race at the supposedly secluded Clonus campus, a vehicle drives by in the distance on the left-hand side of the screen.
When Lena falls off her bike early in the film, a crew member's hand appears on the left, making sure she doesn't fall any further.
When the old reporter introduces the clone to the professor and his son by the pool, the boom mic is clearly visible above him (open matte version).
At the marina, when Richard and Jeffrey are talking on the boat, the boom mic appears above them just before Richard gets up to leave.
A senator asks if Clonus is "creating Frankensteins." This is one of many instances since the 1930's, when the Frankenstein films starring Boris Karloff were released, in which the name Frankenstein is incorrectly used to refer to the Frankenstein Monster. Frankenstein was the name of the scientist, not his creation.