When Willow and Tara enter the Magic Shop at 14:15 they leave the door slightly ajar, and it stays that way in the background through the act break at 14:38 and Tara's subsequent introduction of Donny to her friends, but when she asks Donny why he came, the door suddenly is shut.
At 17:32, when the view cuts from an "over" of Buffy to a "two-shot" of her and Dawn, Buffy's arms jump from down at her sides to akimbo.
At 12:20 in the Buffy / Spike fight sequence, Buffy hits Spike a big one where she does a back flip off of him, and Spike jumps in the air, arching his back, and comes straight back down. We never see him somersault backwards from the hit.
In the teaser, when Tara reaches out to turn off the bedside light it goes off before her hand gets to it.