Continuity mistake: In the scene where Chris takes the temperature of a sick Marie, in the very first shot look closely at Marie's forehead. In the next shot and throughout the remainder of the scene, sweat covers her entire forehead. Many of the beads are large and are absolutely missing in the first shot.
Continuity mistake: When Chris first arrives in his heaven he squeezes a blue flower and blue paint oozes within his fist, between his fingers and some gets to the back of his hand. Additionally, there is a mark of blue paint on his nose and some green paint on the back of his coat. Some of the paint from his hands transfers to his dog, Katie, when he pets her, then he jumps up and runs to the edge of the hill where he spreads his arms out from his sides in joy and laughs. We see green paint remains on his coat, but his hands and nose are now clean.
Continuity mistake: When Robin Williams and Anabella Sciorra are getting married, they are walking down the aisle and she trips. There is a close up a little before and a little after and it is obvious that her veil is different. Before she trips there is a fold in the veil and in the next shot it is nice and smooth.