In addition to the missing 'Private Property' sign, the wreath on the gate has vanished, and the gate now hinges on the right rather than the left side.
When Shannon is walking up her entrance walk carrying groceries and talking with Mrs. Granger the contents of her grocery bags change from one view to another.
At 101 in, Fred is leading Shannon etc. through the front gates to the house there is a visible Private Property sign on the brick column. At 103 in, Peter and Shannon are leaving through the gate but the sign is now gone.
Throughout the movie, Fred says "Merry Christmas" in several languages. He mispronounces almost every single one, including Finnish, Cantonese, Greek, Hindi, Icelandic, and Italian.