Continuity mistake: When Michael Douglas goes back to Sharon Stone's house, there's a table with a lamp on it next to a white chair. The table moves back about four inches throughout the scene and the pillow on the chair, the flower centerpiece, and the stuff on the table on the right also move as the scene progresses. (00:50:35)
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.
Visible crew/equipment: The film crew is visible in Nick's sunglasses when he meets Hazel, the old lady.
Visible crew/equipment: After the scene in Jeanne Tripplehorn's apartment, Michael Douglas meets with the other investigators back at the police station and the reflection of the cameraman can be seen in the glass partition behind him as an investigator says, "I made a couple of calls to Berkeley." (00:38:45)
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.