When talking about divorce after the courtroom has cleared, a lock of Pierce's hair hangs down and after cutting back from Julianne all his hair is neatly in place.
In the bar, when Daniel and Audrey are drinking, the lock of hair on Daniel's forehead appears, disappears and then reappears.
When Audrey first meets Serena outside the rock concert Serena's bracelet on her left arm is unclasped. It's unclasped for many shots, but when Audrey gives Serena her card, the bracelet is clasped.
After getting soaking wet kissing in the rain, Pierce and Julianne go into the apartment and both are bone dry, except for her calves which the shot shows prominently.
At the rock concert, the lead singer pulls away from the microphone and stood singing while the vocals continue.
When Audrey visits Daniel's office she knocks on the glass part of the door, but it sounds like wood.