When Lauren and Nate are sharing a kringle, Nate's hair changes between shots showing him from the front and showing him from the back right side.
Movie takes place in the mid Decemebr before Christmas in Boston, Massachusetts. The only time you see winter is in stock footage. You can hear loud bird singing in several outside scenes and singing birds stop singing in the late summer. During the zip-line scene in the forest, there is a digital snowing, and forest is the full of green deciduous trees.