Visible crew/equipment: Ali's assistant sits in her office as she goes to apologise to him. But in the reflection of his glasses you can see the green screen which I suppose is meant be the windows of the office. (01:32:00)
Continuity mistake: During Stella and Will's walk, Will's scarf was consistently wrapped one time around his neck, but the length of his scarf on either side varied. The right side was usually much longer than the left side, but the ends were about even other times. When Will was lying in the snow, the scarf ends were almost equal (reaching about half-way down his coat); when he stood up, the ends were far apart. After he fell in the snow, Will got up and adjusted the scarf ends to be about the same in length. (01:25:35 - 01:29:30)
Continuity mistake: When we see Erin and Leah for the first time, they're talking and smoochin'. Despite the conversation being continuous, the reciprocal position of their hands changes abruptly between shots at the beginning (Erin's hand is on the outside of Leah's, then on the inside, then outside again). (00:05:25)
Other mistake: Judy is singing on stage with some showgirls. She is singing into a wired microphone. At the end of the song she twirls around twice, but the microphone does not appear to get wrapped around her. (00:49:35)
Continuity mistake: At the beginning of the movie, the two knights are walking across the courtyard to get on their horses. When they mention the falcons' names, a young lady wearing an orange striped cape curtsies before them in passing. A couple seconds later during the close-up of girls ogling them from distance, the same lady passes in the foreground, coming from the opposite direction and in a totally different spot. (00:00:55)
Factual error: The protagonist wakes up supposedly at 5 AM of December 2nd in New York City. Outside, the sun is shining, almost two hours too early. (00:00:15)
Continuity mistake: Laurie's scarf changes position when he tells Amy about the opera that he's writing. It happens again when he proposes. (01:14:10 - 01:15:50)
Continuity mistake: The evil stepsisters shove Kat at the feet of Dominic with latte splattered all over her face. But the mess looks different in the various shots. For instance, in the close-up when he asks her if she's okay and if she hurt herself there's a big splotch by the corner of her mouth, which was not there earlier (she was dirty under the nose at most) and is gone in the next shot. (00:04:00)
Continuity mistake: Enzo's red tag hanging from his collar usually can be seen, but he did not appear to be wearing the red tag outside when Eve told Denny she was pregnant or when sitting in the bleachers with Eve at a race. (00:19:48 - 00:21:09)
Other mistake: Nicole was standing up holding a round cake with both hands and was able to tilt the cake down about 45° to show others the top without the cake sliding off the plate - or any icing shifting.
Continuity mistake: When Aunt Sarah arrives, she dumps her luggage in the hands of Jim and then passes him to his right, leaving him between herself and the door. In the reverse shot, Jim is on the opposite side. (00:29:15)