Continuity mistake: Back at Michael Douglas' apartment, Sharon Stone uses his ice pick to break up a big hunk of ice for their drinks. In front of her is a tray with various items and loose change in it, with a padlock and a piece of paper to left of it. Everything in the tray and the piece of paper move throughout the scene without anyone going near them. (01:03:55)
Continuity mistake: When Roxy tries to run over Nick the left front light is broken off - in the next scene it is back on.
Continuity mistake: When Michael Douglas first sees her at the beach house he says, "Miss. Tramell?". If you closely at the shadow cast by the railing it's obvious that at least an hour has gone by between shots as he walks down to talk to her. The lounge chair has also moved between shots. (00:10:50)
Continuity mistake: When the detectives ask Catherine to go in for questioning, she has her hair down. Then, a minute later, she comes out with her hair up. Problems: one, there's no way Catherine could do that on her own, and no-one else is in the house; two, even if she could it would take much more than a minute, say thirty minutes.
Continuity mistake: Jeanne Tripplehorn walks into her apartment and Michael Douglas is there asking questions about her and Sharon Stone in college. If you look closely the pillows on the couch on the left of the screen move from the time she opens the door to when she walks into the apartment. (01:38:35)