Deliberate mistake: In the scene where we see Bella in her room looking out the window, the months are passing, but she is always wearing the same clothes. (00:28:30)
Continuity mistake: During the paper cut scene, when Bella is thrown against the table, there are 5 vases of flowers and 3 sets of candles. After she hits the table she lands against one of the vases and knocks the 2nd one to the floor, but the next shot shows only one vase left upright. (00:14:50)
Bella Swan: It's my birthday, can I ask for something? Kiss me.
Trivia: The director was not expecting the unintentional movie audience laughter when Alice's vision to Aro shows Edward and Bella running in slow motion through the woods as vampires. Jokingly, he says it is because Edward runs like a girl. (Audio commentary.)
Question: What does Jacob say when he tries to kiss Bella, in her kitchen? He whispers something in a native language. I put the subtitles on (DVD) but the subtitles just say "foreign language."
Answer: He says "Kwop Kilawtley" which means "stay with me forever" in his native language.