Other mistake: During the end credits, when the Bride is driving through the cliffs, there is a part when she turns her wheel left, but the car turns right.
Other mistake: At the very end of the film, when Beatrix kisses B.B. in the motel room, B.B. looks very briefly at the camera before the two of them smile in the direction of their television set.
Chosen answer: The way she talks to Budd as he lies dying, seems to indicate that she has disliked and hated him for years, plus the fact that she feels that he was not "worthy" of killing Kiddo (seeing how Kiddo was a fantastic warrior, while Budd is an alcoholic hick). However, it would be difficult for her to get close enough to kill him earlier, as he would not buy any excuse why she just came visiting. But when Budd actually invites her over, she gets a chance to get back at him, and in the same while take the credit for killing the Bride and retrieving her Hanzo sword for Bill. Vengeance and personal gain in one swoop.
Twotall