Continuity mistake: When Tim is at the party at the beginning, the black girl goes and talks to Tim's girlfriend, and the lime on the black girl's martini changes places numerous times in between shots.
Continuity mistake: When Tim goes to the house and Kate falls off her horse, they go inside. When she leaves you can hear a car engine start. If she rode her horse to the house how did she get her car there?
Continuity mistake: When Tim is going home, he is driving down the road and out the passenger side window is a police car. The next shot is the front of the car and the police car is not there.
Continuity mistake: When Tim drives up to his old house for the first time as an adult, there is someone sitting on the porch appearing to be knitting. When he starts to climb the stairs that person is now gone. You have to go slow, frame by frame, to see the person who is there about 2-3 seconds.