Vampires are supposed to have heightened hearing capabilities so why can’t Spike hear the nerds discussing their plans for the Slayer? He’s only standing a few feet away. If he identified the people who had been meddling with him, Spike would have scored some serious points with Buffy.

Why is Amy’s hair longer and lighter than before she became a rat? Her hair has even been styled differently.

When Buffy and Spike are fighting the vampires, Buffy uses a post from a letter-box to stake one of the vampires. From the vampire’s point of view we can see that Buffy held out the blunt part of the pole, however when the shot changes we can see that Buffy …

When Spike is talking to Giles about him and Anya he says, “I saw you two, sleeping together”. Giles and Anya awoke before Spike did - how can he have seen them sleeping together?

You can clearly see that the lights in the bookcase behind Giles are on before the gang fall asleep under the spell. When Buffy awakes, she turns the lights on again. Who turned them off?

After the demon disappears in Once More, With Feeling, everyone keeps on singing, which a few people have felt is a goof. Thanks to Missi who sent the following explanation: Just before the demon leaves, he sings “Say you’re happy now, once more with feeling.” He’s cursing them to do …

When Buffy is dancing at the end of “Something to Sing About”, the dead/unconscious body of the puppet demon behind her keeps moving. When she starts dancing, it’s to the left of the stage and we then see it’s moved to the right.

As Buffy sings “Something to Sing About”, we see Anya and Tara standing behind her, with Tara moving closer towards Anya. Then when Buffy sings the line, “family and friends”, the shot shows that Tara and Anya are nowhere near each other.

When Tara holds the flower beside the book, the flower is laid the same way as the book. When the camera cuts back to the flower, it is flipped in the other direction.

When Sweet is singing and Dawn’s dress changes, you can see that the dress is different before the camera pans out.

When Xander and Anya are singing “I’ll Never Tell”, just before Anya sings, “he’s swell”, you can see both Anya and Xander just finishing sitting down. However as Anya is singing the line, they show her starting to sit again, without getting back up.

When Tara sings “Under Your Spell”, she and Willow are suddenly dancing inside. The parting in her hair changes between the two scenes.

When Buffy falls during “Going Through the Motions”, the sword is by her head but when she jumps up it is by her side.

While Buffy is pinned under the crate, and the camera focuses on Faith fighting, you can see Buffy’s stunt double crouching down to the right of the screen.

When Wesley takes the manacles off Faith and puts his own handcuffs on her, you can see that one of the cuffs falls off her wrist and Eliza quickly covers it with her hand.