Continuity mistake: When Buddy first meets Jovie, she is wearing much more make-up by the end of the scene. The amount of lipstick increases quite a bit, for example.
Continuity mistake: When Buddy is lying in the roll-out bed in the living room of his father's house and asks to be tucked in, his father does so. His father comes back up and ends up having a red thread on his shirt. The shot switches to Buddy, then back to him and the thread is now on his right arm.
Continuity mistake: In the snowball fight scene we see some snowballs hit the rock behind them. The snow on the rocks keeps disappearing and reappearing between shots.
Continuity mistake: When Buddy's dad opens the present from Buddy, he holds it directly above the box. In the next shot, a closer shot, he is holding it next to the box. The following shot shows him holding the present directly above the box again.
Continuity mistake: When Buddy is on the ice floe beginning his journey to New York City, Mr. Narwhal emerges from the water. Buddy's body is canted back with his left arm raised as he watches Mr. Narwhal surface, but the next shot of him shows him standing straight with his arms by his side.
Continuity mistake: When Buddy is in the Lincoln tunnel, the busses alongside him change positions between clips.
Continuity mistake: When Buddy is drinking the Coke, the bottle turns to show the label.