Brooke (Kidman) & Chris (Efron) rush her daughter to the hospital - in the very next scene (in the waiting room) both have noticeably different haircuts. Perhaps they stopped at a stylists on the way.
When Zara and Chris pull up to the grocery store at the end of the movie, her car is over one of the lines. Later, when she comes out of the store with Leila, the car is centered in the parking stall.
Brooke heads to her mother-in-law's early for Christmas. She doesn't even consider inviting Chris until she's there. But after the holiday they leave together in the same car rather than separate cars.
When Chris makes the pile of avocados fall it cuts away and the pile is unmoved. They also totally gloss over the fact the floor should be covered in avocados.
When Brooke walks into the restaurant for her date with Chris she is wearing noticeably low-heeled shoes. Later in the evening when she and Chris are sitting on the floor talking and her shoes are off, they have much higher heels.
Around 25 minutes in, Chris arrives at Zara's house in a black Cadillac, pulling up right outside the front door; when Zara arrives home the car is no longer there.