During James "Sawyer" Ford's parents' funeral scene, a 1977-model Cadillac hearse as well as a 1980-model Cadillac hearse are shown. (Since IMDb reports that James Ford was born in 1969, and the screen note reads that he is 8 years old, this funeral took place in 1977.)
(at around 1h 2mins) When Jack backs from Swan station and Hurly is drinking Sayid some water, Hurly says, "Dude, what happened to your face?" he's sitting by the van but in the next shot he's standing.
The first time we see inside Jacob's workroom, the flames from the fire are going backwards, indicating the video was time-reversed - perhaps to indicate that time doesn't work right in Jacob's presence.