In the beginning, Grace offers to make Ellen a drink. Ellen quips, "You know very well, I don't drink". Later, poolside just before we meet Steve, Nick asks Ellen if she would like a scotch. After three years of marriage, Nick should know Ellen doesn't drink.
When Nicholas is chasing Ellen in the car after leaving from the hotel, they speed around a corner. When Ellen turns the corner, there is a dark car parked there, but when Nicholas turns the corner right behind her, there is a white car there.
When Ellen fumes and leaves her Monterey hotel room, she opens the door and then returns to pick up a forgotten item (jacket, purse), leaving the door ajar; however, when the camera angle changes and she's walking towards the hotel room door to leave, the door is now closed.
When Grace faints, Ellen takes some roses out of a vase to sprinkle water on her. When it doesn't work, she sets the flowers down on a chair. Later she goes to make a phone call, and sits in the chair, and the flowers appear on the table instead.
When Nicholas is chasing Ellen in the car after leaving the hotel, they speed through a car dealership. Cars flee the building to allow Ellen to pass through without accident. Once Ellen's gone, the cars back into the store only to drive out again to allow Nick's pursuing taxi safe passage. The scene is spliced together rather than done in one shot, as evidenced by a green car parked streetside in the background that suddenly disappears before the taxi drives through.
With Nicky as passenger, Ellen drives his car to a particular hotel. Being a lawyer and knowing Ellen has been away from civilization for five years with no time to renew her driver's license, Nick should full-well know he's libel for allowing her, an unlicensed driver, behind the wheel of his car and, therefore, not allow it (especially as he wants to guarantee getting her to the right hotel to "accidentally" run into Stephen Burkett).