I finally got to see the movie. I was amazed by two things: one, how much Lyra reminds me of an older Bug, and two, a scene that wasn't in the book [
spoiler here].
When I saw that scene, I was stunned. I actually paused the movie, stood up, and said out loud to nobody in particular, "She... Oh my God, she actually ---!" And apparently Pullman came up with that idea, too, so I guess the
Word Of God says it's canon.