Corrected entry: Elizabeth and Jack are seen coming ashore on the island soaking wet, but in the very next shot Elizabeth's hair is completely dry. Granted, this could be a while later, but Elizabeth's frantic questioning about how Jack got off the island last time seems to be something she'd ask right away.
Krista
Corrected entry: In the last scene, no one seems to think it's strange that Will is wearing a hat that's 100 years out of date.
Correction: Time has lapsed in between the shots, this is clear because when they first get to the island Jack is wearing his boots and vest, but when they are wandering around in the next shot his boots, vest and his accessories are all gone.