When Edward is drinking his cocoa, the whipped cream is above the rim of the cup in the forward long shots. In the reverse shot when Maeryn tells him the next step is to sip the cocoa, there is no whipped cream left at the top of the cup, the whipped cream which reappears in the next forward long shot.
Just after Edward and Olivia first meet and are walking down the straight a few extras pass by them more than one time even though they never stop walking. Note guy with glasses and beanie hat dressed all in grey.
When Olivia introduces Mareyn to Edward the first time, Olivia's purse strap is on her shoulder. When Olivia turns to take her Maeryn's hands in hers, the strap falls off her shoulder onto her forearm. In the next camera angle, where Olivia is shown from the front, the strap is back other shoulder.
The movie was shot in the late summer or early autumn. You can see the green deciduous trees in the several street scenes in the background. They tried to hide it as much as possible with close up shots. There are few scenes when is snowing, but it's clearly digital snow. There is even a one scene when you can see people in shorts in background.
When Edward and Olivia meet at Evergreen Park and go for a walk when they approach Kringle's Kitchen there are people across the street in the background walking in shorts.
When pedestrian extras are walking by on the street, they trample and turn up the "snow" rugs in several places, and the rugs in other places have folds.