Continuity mistake: When Quoyle and Pretty come back from the car accident they drive by Wavey and her son walking on the roadside. While they are driving a housing area is passing by as background. Only the two shots that show Wavey and her son are taken in an open area next to a little graveyard, but no houses.
Continuity mistake: When Quoyle gets fired by Card he storms out of the office, not listening any more to what Card has to say. He pushes open a swing door, then the camera is on the abusing Card for quite a while, and when it's back on Quoyle he has only reached the main door that is just a few meters away from the swing door.
Continuity mistake: After Quoyle is done recovering from his boating accident, he gets out of bed and his hand wrapped in a large, thick bandage. Then he turns around and walks through a door and his hand is no longer bandaged; in fact he doesn't even wear a bandage for the rest of the movie, even though his hand had a serious cut from the boat motor.