Johnny Sack tells Tony to meet him at his house at 06:30, when Tony arrives it is full daylight: at that time of year 06:30 would be pitch dark.
When Tony and Carmela are talking to AJ about party planning, AJ's sleeves alternate between down and scrunched up in successive shots.
When the group is gathered together around the table celebrating Raymond Curto's birthday, Larry Barese makes a toast in Raymond's honor. The guys all join him in the toast by wishing him "Buon Natale" ("Merry Christmas"), which should have been "Buon Compleanno" ("Happy Birthday").