Continuity mistake: During the sunscreen scene, Sam has a spot of sunscreen on his left cheek that appears and disappears between shots.
Factual error: In the beginning of the film with Coleen after George gets up, also in several other "morning" shots, the sun is always shown near the horizon or reflecting off the ocean. On the west coast this would make this the evening.
Continuity mistake: In the scene where Sam and George are tearing down the shack together for the first time, we see the wall of the house completely intact, then one shot later, the entire bottom quarter of it is gone with only one light hit of a sledgehammer.
Continuity mistake: In the scene where the nurse is touching George's face, she touches him with one hand while holding a bowl of food in the other. In the next shot, the hands are reversed.
Continuity mistake: When Pizza is brought for lunch the boxes switch back and forth on the table in front of George while he speaks with his wife. (00:37:50)
Revealing mistake: When Josh calls Sam on his cell phone you can see on the phone "No Service", right before he dials the 555 number.
Continuity mistake: In the scene where Josh falls off the roof of the house being built, the fall takes place around the middle of the day, based on the shadows. Yet when the ambulance takes him away, the sun has almost set. (01:32:50)
Continuity mistake: When Illisa is staring out the window, and her mom goes up to find her it takes no time to go from outside to the top floor. (00:02:40)