When Dawn unplugs the TV, we see two different shots of her. In one, she’s holding the plug upwards, in the other it’s pointing towards the floor.

Spike’s reflection can be clearly seen in the store window before he and Xander jump on R.J. to steal his jacket.

Buffy grabs Dawn from the railway track but in the next shot they’re further away from the tracks than they were.

Spike’s reflection can be seen in Lance’s house, in a picture frame.

The collar of R.J.’s jacket changes positions in the scene where Buffy first talks to him.

After Dawn’s talk with Principal Wood in his office, she walks out of the door without her bag - yet she carries her bag in the next scene.

It doesn’t seem right that Dawn would be so inelegant when she tries out for the cheerleading squad. We saw her dance beautifully in Once More, With Feeling, and she said she likes to dance in Lessons.

The cheerleading outfit Dawn wears is different to Buffy’s original. The sleeves are shorter and the skirt is a different design.

Spike left his leather coat at the Summers’ house after trying to rape Buffy in Seeing Red. He then went off to Africa and got his soul back. When did Buffy return his leather jacket so he could store it in the basement of the school?

When Willow sits in the circle to do her spell, we see from the overhead shot that there is an overturned stool nearby. The shadow of the stool is falling on the circle, but in the shots showing Willow’s face, we see that there is no shadow there.

When Buffy and Dawn discover Chloe’s body, the door behind them is open in the first shot then closed in the next.

Buffy fights the students and we see there are at least four dead/unconscious bodies laying around the Seal. When the camera pans out after the Seal has been closed (at 39.11), the bodies have gone.

If Andrew can read the writing on the blade, why did he just think it was symbols before? That’s like thinking “DOG” is a load of weird symbols.

Buffy and Principal Wood discuss the Hellmouth very loudly and unsubtly in front of another member of staff.

Spike/William’s hair is different to his hair in Fool For Love, though it was supposed to be the same time period. This is mentioned also in the DVD commentary.