Continuity mistake: In the kitchen scene Buffy takes the pizza out of the fridge and closes the door, but in the next shot the door is open and two shots later it's closed again.
Continuity mistake: When Buffy sat down on a car and set off the car alarm, she didn't have any dirt on her hands and only a little bit of blood, but in the next shot, there was a lot of blood and dirt on her hands.
As You Were - S6-E15
Continuity mistake: When we see Xander and Anya going over the seating arrangements for their wedding, Xander is eating from a large sack of crisps. During the conversation Anya takes them off him, he takes them back and places the bag next to him. We see the bag after Xander puts it down, and in a closeup shot of him, the front of the bag is facing upwards. But when Dawn comes in, the front of the bag is facing downwards - barcode and ingredients are visible.
As You Were - S6-E15
Continuity mistake: At the beginning of the episode when Buffy offers Dawn another burger from Doublemeat Palace, she is holding the burger in her hands just before Willow comes in with her line, "Hey, workin' lady. Rough night?" The burger then jumps from the kitchen counter to Buffy's hands between shots.
Tabula Rasa - S6-E8
Continuity mistake: When Buffy and Spike (as Joan and Randy) are fighting Bro'os vampires, Buffy kicks down a post box to stake one of them. The pole supporting the post box breaks away at a jagged angle. But when she uses it to stake one of the vampires the end that she uses has suddenly changed to the traditional triangular point, only to return to its original jagged angle immediately afterwards. The shot of her staking the vampire is not a side angle of some uneven ends. Watch as she backs away from the vampire after he's been staked, it is a fully triangular point.
Life Serial - S6-E5
Visible crew/equipment: When Xander is talking to Buffy about blacking out and evil lint before introducing her to the foreman at the construction site, a crew member can be seen walking behind them holding up an anti-glare screen. (Only visible in widescreen.)
Once More, With Feeling - S6-E7
Audio problem: In the episode 'Once More, With Feeling', when Anya sings her first few lines of the song 'I'll Never Tell', you can still hear Xander talking about omelettes in the background, but for the last few lines he speaks (from 'I could do an omelette' onwards) you can see over her shoulder that his voice is dubbed. (00:13:10)
Continuity mistake: When Manny stamps Buffy's card in the time clock, he hands the time card to her with his right hand, but in the next shot facing Buffy, Manny hands the card to Buffy with his left hand.
Continuity mistake: When Timothy shows Buffy how to use the grill, there is a wood-handled grill press, and another tool, right in front of the button panel. However, after he says, "It eliminates variation," in the close-up as he presses the button, both tools as well as the transparent plastic glove he wears have all vanished. (Another mistake notes a different close-up with a disappearing glove.) (00:17:25)
Continuity mistake: When Buffy is assigned to the grill, as Timothy explains the process he's wearing a short-sleeved orange/white stripe uniform. In the close-up, when he places the second patty on the grill, Timothy is wearing a 3/4 sleeve, dark blue shirt. (00:17:15)
Revealing mistake: Right at the beginning of the episode just before we see Warren squirt Jonathan with water, we see Buffy on one of their security cameras. The footage of her is pre-recorded as the progress bar for QuickTime Media Player is visible at the bottom of the screen. The window was moved down to hide this fact, but not far down enough to hide it completely.
Continuity mistake: After Buffy decides not to take the antidote to the demon's venom, we cut to a scene at the mental institution. The doctor talks to her about ridding her mind of the things that support her "hallucinations". As he talks to her about this, the position of his hands change from pressed together in front of him to in his pockets between shots.
Visible crew/equipment: At the beginning of the episode after the Buffybot kills the remaining vampires and the rest of the gang is grouped together, the shadow of a boom mic can be seen below a tall gravestone behind Giles, far right of the screen.
Once More, With Feeling - S6-E7
Audio problem: In the final song "Where Do We Go From Here", you can hear Spike still singing even after he has apparently stopped. He and Buffy continue singing until after the line 'When do the trumpets cheer'. It is noticeable because James Marsters sings the word 'cheer' slightly out of sync with everyone else.
Continuity mistake: When Buffy is being offered the 'doublemeat medley' burger by her boss, the burger looks different in close up than in the long shots. In the close shot, the burger looks overall bigger, more filling is visible and there is more lettuce sticking out.
Continuity mistake: Just before Buffy storms out on Spike, she puts on her denim jacket. When viewed from in front we can see the jacket is only half over her shoulders and her hair is loose. The shot cuts to view her from behind, and the jacket is now completely on and her hair is tucked under the collar.
Once More, With Feeling - S6-E7
Revealing mistake: The knives Giles throws during Buffy's training are a very poor CGI job if you watch it in slow mo. All three knives Giles takes off the wall are identical, with a broad curved blade and a plain black handle. The first one has a transparent blade as it flies toward Buffy, then we hear it bounce off the far wall and it's way out of scale for the distance. The second knife has a diamond-patterned grip instead of a plain one. The third knife conveniently spins in midair for a second so Buffy can kick it out of the way. (00:30:35)
Continuity mistake: The finger changes position in Buffy's hand as she picks it up. (00:23:35)
Chosen answer: Angel is saying that he is still jealous and Buffy recognizes that this is his way of saying he wishes that they could be together. That is why they both smile.