Other: When Mitch is in the car, after listening to the radio he switches it off and the subtitles read 'Clicks of radio', yet it should be 'Clicks off radio.'

Continuity: As Lydia carries the birthday cake out, the shades of the window behind her are open. When we see this window again a few seconds later as she runs into the house the shades are closed.

Continuity: When Mitch and Melanie are talking in the café, the bottle of peroxide on the table moves from being near Mitch to near Melanie.

Continuity: Inside the restaurant Melanie talks to her father on the phone at the bar. The phone's chord changes position between shots. At first it's resting on her sleeve then in the next shot it's on her forearm.

Continuity: All through the party scene, the balloons change position, and balloons disappear and appear too.

Continuity: After talking to Mitch on the phone, as Melanie sits behind Annie's desk there are two pens on top of the sheets of paper to the left of the pencil holder that were not there before. Neither Annie or Melanie touched a pen or pencil in this scene.

Continuity: When Annie tells Melanie that she should go to Cathy's party the belt of her robe draped over her right knee moves between shots.

Continuity: As Lydia walks up to Mr. Faucet's room, the hallway is dark except for the light coming through the door. The sunlight on the floor is much wider than the window of the door in front of her and there's no evidence of any light fixture above her or her hair would be lit up.

Continuity: As the birds fly out of the fireplace, the pillows that Lydia was sitting on have been fluffed up between shots.

Continuity: As Melanie leaves the card at Mitch's apartment door the drapes on the window behind her are still. In the next shot they are blowing in the wind.

Continuity: As Mitch leaves the house to get Melanie's car in the garage the large brown wooden chair that has been to the right of the door throughout the movie has disappeared.

Revealing: The birds on the floorboard of Melanie's car are fake. If you look closely at the one on the right it wobbles like a toy as she's driving.

Continuity: After Mitch finished pouring out the drinks for Melanie and himself there was still a little bit left in the bottle. He never pours out any more but as they get to the bottom of the hill when they throw away their glasses the bottle is empty.

Continuity: In the shot of the party looking down from the top of the hill the barbecue is sitting behind and to the middle of two lounge chairs. In the next shot the barbecue is to the left of the two lounge chairs. At the end of the scene it's moved back.

Continuity: In an earlier scene as Melanie plays the piano and Cathy stands there look closely at the drapes on her left. In that scene the drapes were right up against the edge of the wall, now as Mitch checks the windows before the last attacks they're pushed back several feet.

Continuity: As they all prepare to leave the house part of Melanie's bloody dress sticks right up towards her chin, but when Mitch and Lydia swing her around towards the car it's not sticking up anymore.

Continuity: When we first see Melanie talking to her father the phone is pushed right up against the edge of the bar. The next time we see it's at a 45-degree angle to the side of the bar and no one has touched it.

Continuity: The body of the gas station attendant moves to the left between shots, as Mitch runs to help him, and Mitch's position changes after he runs to help.

Continuity: As the birds gather on the monkey bars behind Melanie she looks to her right and straight up and sees one lone bird flying past a television antenna. This is incorrect because first of all she's looking up to high and second we've seen in that direction and there is no house there, just a hill. The house is across the street.

Continuity: Walking up the hill both sides of Melanie's collar are turned up by the wind. In the next shot at the top of the hill her collar is turned down.