Let's see if we all saw some things in the same way. Below are a few theories that I think have been proven/shown. What are your comments and what are some other ones?
Sayid did turn "dark" and follows the pattern of a black shirt.
Jin was dumb enough to really lead Flocke and Clair to the temple.
Claire doesn't remember the reality of losing Aaron and in the recap from last week's episode, the writers called her crazy and now like Rousseau.
Jack and Hurley must have been on another island or something because it was daylight when we last saw them and their trek must have long enough to take til sundown.