Character mistake: When they're on the island and the INGen helicopters are flying in, Jeff Goldblum takes the binoculars and looks through the wrong end. (00:32:30)
Character mistake: Sarah is a trained expert with predatory animals. But when her jacket is covered with blood (and not just any blood, the blood of the infant T-rex), and they're in a forest surrounded with carnivorous dinosaurs, and she knows that they need to pass through Velociraptor territory, and she thinks that the T-rex might follow them, she doesn't think to take the jacket off. And the others, who also happen to be hunters who would surely know that the blood would attract predators, don't say anything about it.
Suggested correction: While you are right, it's still not that much of a mistake because not only does it tie into the Butterfly Effect from the first movie, but also maybe Roland used it to his advantage, meaning an opportunity to shoot the Buck Rex since using its baby didn't work.
You're really grasping at straws on this one. The top priority for everyone at this point is to find safe shelter. A bunch of dinosaur experts aren't going to jeopardize that by allowing someone in their group to walk through dangerous territory with blood-soaked clothing, and Roland isn't going to risk the lives of other people to hunt the T-rex. This is just bad writing by the filmmakers, plain and simple.
What butterfly effect?
He's talking about when Ian Malcolm was explaining chaos theory and used the term "butterfly effect." But like Phaneron said, the person was really grasping as straws and this scene has nothing to do with what Malcom was talking about.
Suggested correction: I don't think this is actually a mistake. Yes Sarah's jacket is covered in blood from the baby T-Rex, but as you say they've got to pass through Velociraptor territory. In JP3 it was noted that the T-Rex pee keeps smaller dinosaurs away but actually attracts the Spinosaurus. The scent of the T-Rex blood could actually also have the same effect as the pee at keeping the smaller dinosaurs away.
Character mistake: When he rescues the baby T-Rex, Nick says that "she" has a broken leg, but for the rest of the film, the dinosaur is referred to as a male.
