Continuity mistake: Right before the graduation service, Dawson is joking with Joey to get her mind off her speech. The wind has blown Joey's tassle so it's caught partly on her left ear facing the camera. But in the next shot of her, the tassle is suddenly hanging normally in front of her ear. She hadn't appeared to move her hands.
Continuity mistake: When Joey and Pacey are talking at the table on the Promboat after the 'brutal breakup'; her arms keep changing position too quickly between shots. As Joey says, "You break my heart into a thousand pieces," her right arm is folded across her, and the right hand is resting on her left sleeve just below the bare shoulder. The next shot, from behind Joey you can see her right hand still gripping her left shoulder, but the sleeve is further up and ruffled on that side. Then just before she says "Just leave me alone", the next shot again shows Joey from the front; and suddenly her left arm is raised up, hand by her face, and the right arm is down on the table with the hand curved up in the air. As she says "Just leave me alone"; her left arm is still up and hand resting by her face, and the right arm is laid sideways across her, hand on elbow. Then the next shot of Joey shows that suddenly her pose has changed; and her left arm is raised up diagonally, hand across her right shoulder, and her right arm is still laid horizontally across her, hand by her elbow. All of these transitions are far too abrupt and fast to be realistic.
Plot hole: When Jen introduces Joey to her father in his office, she calls her "Joey Potter from Capeside". But later when they are at dinner, Jen's father suddenly refers to Joey as "Josephine" which seems strange as he wasn't told that was her legal name, and only those who know her well would know that. Joey is not necessarily a nickname only for Josephine, so it wasn't just a logical deduction.
Continuity mistake: During this scene towards the end, Bessie insists on putting lipstick on Joey for Graduation. She dabs it on quickly, and there appears to be a noticeable smudge or mark on Joey's upper right lip from the lipstick. But the next shot of Joey, the lipstick suddenly appears normal and perfectly applied, and the smudge is gone. (00:33:40)
Plot hole: At the end of the episode, when Pacey and Joey finally sleep together, there is a moment before when they are both standing in front of the mirror talking. To the right of the mirror, there is a large window looking directly into the bedroom they are standing in. The curtains are pushed back, and you can see the outside through the window. Pacey and Joey make their way slowly towards the bed, making it clear they have one thing in mind. They don't seem to notice the window which would give full view to their bedroom and bed, and neither of them makes any attempt to close the curtains. Noone seems to care that anyone walking by would be able to look directly in on them while they are 'busy'. (00:39:25)
Revealing mistake: When Dawson arrives home after his evening with Gretchen and friends, his Mother is seated on the couch waiting up for him. As she talks to him, she stretches back, still seated on the couch; and you can see on her stomach the outlines of the padding she is wearing to make her appear pregnant when she really isn't. (00:35:25)
Plot hole: When Pacey and Joey run into Jen and Jack outside the restaurants, Jack suggests they all go to the pizza place near them. Joey and Pacey agree, and it is implied that all four of them are going to the same place to eat dinner together. But the next shot of inside the pizza restaurant only shows Joey and Pacey seated at a large table with Drue, Anna and the other guys. Jen and Jack are nowhere in sight. It isn't likely Jen and Jack wouldn't be seated with or near Pacey and Joey for dinner, since they suggested they all go there to eat.
Revealing mistake: When Jen and Jack are having coffee at the coffee shop, Jen walks outside and turns to bang on the outside window of the store to get Jack's attention. When she hits the window, you can tell it isn't a real window made of glass. It's obviously some sort of plastic, as it flexes too easily and moves too much to be a real store window. This was probably done to make the window safer for the actors during this scene.
Continuity mistake: When Dawson is coming down the stairs to talk to his parents in the living room, there is a shot of Gail and Mitch on the couch together. Gail is sitting in such a way that her legs are draped over Mitch's legs, and her right leg is specifically hanging over his right leg touching it. But in the next shot, they show Gail and Mitch from the other side of the couch; and suddenly she is sitting with her legs up, bent at the knees and Mitch has his right leg up. There wasn't enough time between shots for anyone to move.
Revealing mistake: When Grams is in the Kitchen with Jen and Jack, her sweater isn't buttoned right. When she walks close to the table you can see that the bottom edges of the front of the sweater don't match. It appears to be about one button off-one side is higher than the other. (00:26:35)
Revealing mistake: In the first scene, Pacey says something like see I think we should probably drop anchor here, have a bite to eat (and other things)... As he's walking around the boat, the camera shifts over and you can see two ropes that indicate the boat is already anchored or docked to something.