Abigail Breslin previously played the same character situation in Raising Helen (2004): an orphan who is sent to live with her mother's sister in a New York apartment.
The Dolcetto wine mentioned in the restaurant during the early part of the film is said to have come from the Adelaide Hills in South Australia. This is the homeland of the film's director Scott Hicks who is also a wine-maker when he is not making films. The wine mentioned is in fact the director's own wine label from his winery Yacca Paddock Vineyards in the Adelaide Hills, South Australia.
When Kate comes into the restaurant after her sister's death and finds Nick there, he is singing. A kitchen cloth is in Leah's left hand behind her back. In the next shot where he sings to her baby, her right hand holds her stomach with the kitchen cloth. However, in the next shot it is in her left hand again.
When Kate starts the pillow fight with Zoe, she takes a pillow in her right hand, ready to swing it from right to left. On the next camera shot, she swings the pillow from left to right with both her hands.
When Kate and Zoe are walking alongside a yellow school bus on the way to Zoe's first day at school, a mother with her son is crossing the road. As the mother and son pass the front of the bus, the son drops his book. The son tells the mom and they pause in the path of Kate and Zoe briefly before being forced to move on, leaving the book behind in order not to block Kate and Zoe. A crossing officer attempts to pick it up for them before leaving it as the mother and son exit the scene.