Towards the end of the movie, there is a banner in the town square that says the Christmas parade with be on December 24 at 10 am. However, the parade actually took place at night.
When Grace is trying to convince Ben over the phone to be Santa, she says "Once a Green River Hawk, always a Green River Hawk, right? Go Hawks!" Ben oddly replies with "That's really more of a crow." The disconnect is because Grace was supposed to make a "ka-kaw" bird sound at the end of her dialogue, but didn't.
After Grace finishes painting her picture, she throws a drape over to cover it. That drapery changes position several times during the next few scenes. This often happens when several takes are done for a scene and the final editing uses the various cuts with differing backgrounds.
Auto radio during the snow storm states I-95 closed between Hartford and Boston. I-95 does not go through Hartford.