The closing scene was re-shot while Hugh Jackman was filming X-Men (2000) and so Eddie's hairstyle is different from the rest of the movie.
The light switches change position when Jane and Eddie are chatting in her bedroom.
Jane's handbag straps change position between shots as she tells her girlfriend that Brown has invited her for New Year's Eve.
The same extras walk back and forth in the background during Jane and Eddie's conversation at the end of the film.
As Jane runs from the studio after Eddie at the end, her right hand is gloved but her left hand is ungloved (and in her pocket). When she reaches Eddie her left hand is gloved.
H&H (a well-known bagelry in New York) does not toast or put cream cheese on its bagels.
The amygdala is not located in the nasal cavity - as Jane reads in one of her text books. It is a subcortical structure found in the temporal lobe of the brain.
When Jane is looking at search engine results while doing research on the Internet, the browser title bar says it's displaying a GIF file.
Jane's shirt sleeves change positions while she is talking to Eddie in her room after they had spent the night together in the same bed.
On the magazine cover listing the Dr. Marie Charles article, the space is missing between "Dr." and "Marie".
When Jane is yelling at Ray in Diane's office, you can see an orange X where 'Ashely Judd' is standing. The camera men had zoomed too far out that you could see the marker.