Factual error: When Ryan and Jennifer are hanging out at their lookout spot, over the Golden Gate Bridge, they are looking at the bridge from the Marin County side. For those of you who aren't familiar with Bay Area geography, the distance between Berkeley and Marin County is about 15 or 20 miles, yet the two refer to walking back to campus a few times.
Continuity mistake: When Jennifer gets into the airport taxi, she leaves her big hat next to the steps. She doesn't have it with her in the taxi, but when she runs up the stairs to where Ryan lives, she has it in her hand.
Continuity mistake: When Ryan and Jennifer are talking, in the shots facing Ryan, Jennifer's hair is moving and standing up a bit (due to the wind), but when in shots facing Jennifer, Ryan's hair is completely still and down.
Continuity mistake: In the club scene, when Jennifer tells Ryan to just do what the lead dancer does, everyone (except Ryan) perfectly copy the lead dancer and do this without a time gap at all.