While Heather and Chris are shopping in a Christmas store, Heather picks up a stuffed dachshund that's wearing a funny Christmas cap. As the cameras and angles change, sometimes the dog's cap is curved down and sometimes the cap is bent and pointing up.
Dempsey is spelled Depmsey on the welcome package at the hospital.
Heather and Chris are expected to check into the hospital at 6 am, but when they say goodbye to their families it is clearly broad daylight, which is not possible in December in North America at that time.
At the beginning of the movie when Chris comes in for his interview his hair has quite a bit of snowflakes in it. He speaks with the receptionist a few sentences, and the snow is still in his hair with no melting. But suddenly at his very last response to a quick question, the snowflakes has completely disappeared.