Revealing: In the swimming pool scene, when David is sitting at the bottom of the pool, you can clearly see a scab on one of his knees.

Continuity: After the pool incident when David is writing letters. Monica is looking over the letters that David has written. There's a point where you can see that she's still holding at least 2-3 sheets of paper but when the camera shifts back to the writing there's only one in her hand. There should be more than one paper in her hand.

Audio problem: When Monica runs back upstairs to see what David did to her perfume bottle, the sounds of the footsteps on the stairs don't sync up with the steps we see her taking.

Plot hole: Hair does not contain DNA so the boy's mother could not be recreated from just a snipping of hair. The hair follicle contains DNA but that would only be present if the hair had been ripped out. The robot bear that gives David the hair didn't really have a chance to get any hair as he left with David early on in the film and they never returned. Added to that even if he did have the opportunity, he wouldn't have thought about getting extra hair. They only find out about the DNA cloning at the very end of the film when the mother had passed away a long time ago.

Continuity: The poem displayed in Dr. Know's booth and the one on the door in Manhattan are slightly different. Dr. Know displays the line "waters and the wild" whereas the poem on the door read "waters of the wild."

Plot hole: When Martin decides to antagonize David by eating spinach, he eats it from his plate. When they both eat the spinach frantically, they each eat out of a large bowl. Where did the second large bowl come from, and why would there even be a second one if they only need enough for three people?

Continuity: When Monica first meets David, David walks out onto the carpeted floor and takes a step down to the wood tiled floor. He taps his feet on the wood tiled floor and then steps back up to the carpeted floor. He taps his feet again and turns around to face Monica. This is just before he tells her, "I like your floor." The mistake here is that Monica was pulled from the carpeted floor to the wood tiled floor before David walked in. So, David should not have had to turn around to face her because she would have been in front of him ... not behind him.

Continuity: In the scene where they are operating on David after he ate the spinach, if you look closely, you'll see that the little electronic gadget that pops out of David's torso comes out three different times.

Audio problem: When Henry asks David why he was going to cut Monica's hair, the sound is out of sync with his mouth.

Revealing: When Monica is reading to Martin, her cryogenically frozen son, you can see the body move.

Continuity: When the boys are swimming, you can see one boy get out of the pool twice.

Continuity: Near the end of the film, when David is talking to the "blue fairy," her hands - as the rest of her body appears plastic. However, when David hands her the piece of hair, the hand is a real woman's hand.

Continuity: When we see the chef mecha in the cage, he has a hat on, and it is a permanent part of his head. But earlier when he was searching for an eye in the pile of stuff, he doesn't even have it on.

Continuity: When David goes to cut a little hair from Monica about half an hour into the movie she is facing left, shot of David, back to Monica, now she is facing right.

Continuity: In the scene where Martin is convincing David to go cut a lock of Monica's hair, watch David's top pajama button. When you see David head on, it's unbuttoned, but when seen from the side, it's buttoned.