Other mistake: The spaceship used by Kal El is very small for a 5 year trip - he'd need to eat something in that time too!
Suggested correction: Since we know nothing about Kryptonian technology, we can only speculate how or if supplies are stored.

Directed by: Bryan Singer
Starring: Kevin Spacey, James Marsden, Kate Bosworth, Brandon Routh
Other mistake: The spaceship used by Kal El is very small for a 5 year trip - he'd need to eat something in that time too!
Suggested correction: Since we know nothing about Kryptonian technology, we can only speculate how or if supplies are stored.
Deliberate mistake: When Lex tests the crystal fragment, it knocks out all the power on the airplane Lois is flying in, yet the flight attendant's amplified voice can still be heard over the speakers. (00:30:40)
Superman: Your wrote that the world doesn't need a saviour. But every day I hear people calling out for one.
Trivia: The two writers of the movie make a cameo appearance as the two teens in the museum who are told it's time to leave and they are a bit "man-handled."
Question: When Jimmy is giving Clark the cake, Mr. White says "where are the photos of that birthday clown massacre thing?" Is this suppose to be a nod to The Joker? I didn't think any of Joker's origin stories had him as an actual birthday clown that killed people until this recent Joker film.
Answer: I don't believe it is. This is a half reboot sequel to the classic Superman 2 movies and other than being a DC character, has no ties to other properties of the DC comic lore. This is more likely just meant to be something funny they could have Parry White say to get a laugh about him bringing up something random and ridiculous meant to be taken seriously.