Continuity: In the scene where Mel Gibson is talking to Bette Midler (the psychiatrist) and she realises his "talent" she puts her pen down, then it shoots back to him, and then back to her and she drops her pen on the ground.

Continuity: When the old Chinese granny shows Mel where to go, she is shown holding the umbrella with him, one shot, her hand is above his, and in the next shot it is below his.

Continuity: When Mel Gibson is slipping across the bathroom floor on the bath beads, immediately after remembering the name of his daughters' boyfriend, his pantyhose don't have any holes in them. Earlier in the scene, he makes a big hole in the ankle.

Revealing: When Nick drops the blowdryer, and it's moving in slow motion toward the tub, why is the blowdryer casting shadows on the ceiling directly above the tub?  That would mean there are lights either in the tub or on the floor right next to it.

Continuity: In the scene in the bar, Helen Hunt and Mel Gibson are talking.  During the dialogue, the camera cuts from one face to the other.  Helen Hunt's hair is sometimes in front of her shoulder, and sometimes behind. 

Factual error: When Nick is in the psychiatrist's office and tells her he can read women's minds, Bette Midler's character says, "Sigmund Freud spent his entire life trying to understand what women want," or something to that effect. Actually, Freud didn't care much about the psychology of women, he simply passed them off as having "penis envy". Most psychologists today recognize that Freud was a little off base. It seems like the writers just used Freud's name because he's the only psychologist the general public would know by name.

Continuity: When Mel is kissing the girl from the coffee shop outside her house, she tilts her head to the her left. In the next shot, she is to the right.