Near the end of the movie, there are snow chains already on the wheels when Daisy leaves the cottage at the cape. No one had been to the cape since it had snowed.
When Daisy backs out of the garage, the passenger window is down. A few minutes later, she wrecks the car and the window is up (and cracked).
At the divorce trial, Dan still has the bad scrape on his forehead. Soon after, he's at the cape with Peter and Daisy and his forehead is all healed.
It is pouring rain when Peter arrives at Daisy's apartment in a cab, and its front passenger's side window is down. It remains down even after Dan gets in and it drives off in the pouring rain.