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.
Plot hole: How did the men on the ship get killed? The bridge was intact and the T-Rex was still inside the cargo hold. [A raptor was meant to escape from the boat when it pulled in to the harbour, but they cut the scene from the film and now that bit doesn't appear to make any sense.] (01:40:55)
Suggested correction: The idea of raptors being on the boat is a myth (likely spawned from a similar thing happening in the first book's ending). Though it's very poorly communicated and leaves many unanswered questions (the captain's hand the least of which), the dead hand holding the cargo hold controls implies that the T-Rex somehow got free, killed the crew, then was either lured or willingly returned to the hold where a dying worker closed the doors again.
Visible crew/equipment: In the scene where Ian is speaking to Mr. Ludlow while the group is walking through the rain. If you watch in the background when Ian says the word "Long" something falls from the top of the screen. An extra even follows the item as it falls, you can see his head move. Hard to miss. (01:11:30)
Suggested correction: It's a leaf. I'm struggling to think of what piece of equipment it could possibly have been.
Factual error: When the T-Rex grabs Eddie out of the car, as soon as it takes its foot off the hood the car shoots forward and both it and the trailers fall off the cliff. In reality this wouldn't happen, the trailers would have simply started sliding again slowly. It's also shown that the cars wheels start turning faster as the car picks up speed going forward. Eddie had the car in reverse, as soon as his foot came off the pedal it would have stalled meaning the wheels wouldn't have turned and instead it would have just been dragged like it was doing before he got back behind the wheel.
Suggested correction: If during the time Eddie was being dragged out of the car the clutch was pushed into neutral (it's a manual), all the force the car applied to keep the trailers from falling would have disappeared and basically any way for it to go slowly as well.
Factual error: When Eddie is pulled from the car, it zooms forward and goes over the cliff. In reality this wouldn't happen. Right up until his death, Eddie had the car floored in reverse. Once he took his foot off the pedal the engine would have stalled. If a car is in gear and the clutch isn't depressed then the wheels won't turn (especially on wet mud!) The trailer would have had to drag the car but the wheels are shown turning freely.
Suggested correction: One of the T-Rexes has his (or her) foot on the car when Eddie is pulled out. The car could have been in neutral for a long time (accidentally), then when the Rex lets go the car is dragged.
Whilst what the guy above said is a possibility, he'd pulled the trailer up aways so there was no reason why the trailer just fell in a matter of seconds. It should have just started sliding again like before the car was even attached to it. So even ignoring the car the trailers shouldn't have fallen that quickly.
The jeep was able to hold the trailer in place without reversing for a short while. But eventually Eddie had to reverse to keep it from going over and even manages to pull it back a bit. When the car went into neutral and the T-Rex lifted his (or her) foot off it all the pressure and weight holding the trailer is gone so there is nothing to stop it from falling over. It had already slid quite a bit and the reversing was the only thing holding it, until the foot came along. With that gone the trailer just plummeted, not sliding anymore since there was nothing holding it anymore.
I think you've missed what the OP is saying. Before Eddie attached the winch to the Fleetwood (trailer) it was just sliding slowly and was doing for about a minute before he even attached the car. Once the car was attached it started dragging the car as it slid further off the cliff. The problem here is like the OP has stated, Eddie had pulled the FW back up a fair way. We see a tire go back up onto the cliff and get punctured in the process, it then cuts to an inside view from the FW and we can see it creeping forward slowly. When Eddie is pulled from the car, the FW drags the car off instantly, but in reality that wouldn't happen. Completely ignoring whether the car was in gear or not, the FW had been pulled back up a few meters. It would have slowly started sliding again and would have dragged the car like it did before Eddie got in and started reversing. Once the weight over the cliff became too much, only then would it drag the car off at the speed shown in the film.