Continuity mistake: When Dave leaves his house for work, there is a skateboard leaning up against the wall by the door and there is an umbrella stand with a lot of umbrellas in it. But when Dave gets back home from work the skateboard is now on the other side of the door in the corner and there are now fewer umbrellas in the stand. (00:03:35 - 00:09:30)
Continuity mistake: In the morning after Alex and Sophie sleep together, Sophie is holding a blanket around her and talking to Alex. The position of the blanket changes between shots throughout the entire scene. (00:55:50)