When Doug meets Eleanor in the airport, Eleanor is wearing her flight attendant uniform skirt backwards. Her kick pleat is in the front. The rest of the flight attendants have their skirts on correctly with the kick pleat in the back.
When in the movie Doug writes on the window "I love you", he writes with the finger on the glass that is covered with steam, and it looks nice, but in fact when it's cold and the windows are covered with steam, the steam is always INSIDE the room, not outside.
Narrator: My brother was more successful at reinventing himself than I was. Jacey's parties at the University of Pennsylvannia were the hippest ones around. And even though he had a major in architecture, he seriously minored in beautiful co-eds.