The SnO.C. - S2-E5
Continuity mistake: In Series 2, Episode 'The SnOC', we see Zach punching Seth with his right fist. However, when Summer gives him some ice, he covers his left fist with it (which is now bruised and swollen).
Continuity mistake: Ryan and Theresa are walking along the beach with ice creams. The amount of ice cream changes between shots. This is especially noticeable with Theresa's ice cream.
Continuity mistake: When Ryan is lighting Marissa's cigarette with his, at the start of the shot it's full, then the shot goes to Ryan and it's still full. But then the shot goes to Marissa and if you look at Ryan's cigarette you can see it is almost all gone. Then the shot goes to Ryan and the cigarette is full again. (00:09:00)
Deliberate mistake: Lindsay is not at Caleb's funeral in the last episode of season 2, "The Dearly Beloved". It's unlikely that she would have missed it - she is still on good terms with him and he is her father, the only reason she left was to be with her mother, not because she didn't love Caleb.Obviously they didn't want to create another drama with having Lindsay there while they had to focus on the important story-lines - Caleb's death, Kirsten's drinking and Marissa shooting Trey.
Continuity mistake: At the beginning of the first episode of Season 3, "The Aftermath", Ryan's hair is much shorter than it was at the last episode of season 2. Since they arrive at the hospital with a bleeding Trey, we know that this is right after Trey got shot. It doesnt make any sense that Ryan would go get a haircut right after Trey got shot and then go to the hospital with him.
Continuity mistake: When Marissa is dumped on the driveway by Summer and Holly, Ryan first sees her there her left arm is across her chest with her elbow sticking up. The next shot of Marissa her ams are straight and spread out, and the next they are close by her sides, which is impossible for her to have moved them herself as she is unconscious. (00:34:15)
The Earth Girls Are Easy - S4-E8
Continuity mistake: Season 4 - Episode 8 - The Earth Girls Are Easy - When Kaitlin is at the party, talking to Bullit, her strand of hair changes from hanging over her eye to hanging down next to it, without her moving her hands or head to displace it.
Continuity mistake: When Sandy first picks up Ryan, we see in several shots that Ryan's bike is in the trunk, and that the trunk is open. However, when they drive up to the house, the trunk is now closed, with no bike.
The Gamble - S1-E3
Continuity mistake: In the morning when Seth goes into the kitchen where his parents are, he reaches into the cupboard to get a bowl. However, in the next shot he now has a box of cereal.
The Return of the Nana - S2-E21
Continuity mistake: Marissa's arms change position repeatedly while she and Trey are down at the beach. Also, her bag appears with her, even though she left the apartment without it.
The Gamble - S1-E3
Continuity mistake: When Kirsten and Ryan are talking while setting up for the Casino Night, the camera cuts between Ryan And Kirsten while they talk. Whenever you see both characters in one shot, her fringe is forward, but when you see the individual shot of her, her fringe is pulled back behind her ear. (00:18:10)
The New Era - S2-E4
Plot hole: Early in the episode, Alex tells Seth that the night of the Killers concert is her night off. (She works at The Bait Shop, the concert venue.) At the end of the episode, Alex is paying The Killers, as if she were the manager on duty.
Continuity mistake: In season 2 episode "The Risky Business", the top Summer holds changes position in her hands.
Continuity mistake: In this episode Seth, Ryan and Kirsten arrive at the country club in the Range Rover to get the boys ready for Cotillion. In the next scene we see Sandy with the surfboards in the back of the Range Rover as he has just come home and Jimmy arrives to apologise, soon after we go back to the country club where Seth and Ryan are trying on jackets and meet up with Marissa, Summer and Luke, proving that the Range Rover should still be there, not back home.
Continuity mistake: When Ryan and Sandy leave to take Ryan back home, it is supposedly the morning. But as they leave, the sun can be seen over Marissa's shoulder, which is the west (because her back is to the ocean). Since the sun sets in the west, it can't be morning.
The Escape - S1-E7
Continuity mistake: When Seth and Summer are having breakfast at a cafe he pushes his toast towards her and she eats the crusts. But in the next shot, and for the rest of the scene, the plate is still beside Seth.
Continuity mistake: In the scene where Summer is about to leave for Italy with Zach and then realizes she has forgotten Princess Sparkle, she receives a phone call from Seth. In various shots the phone is on top of her hair and under her hair.
The Gamble - S1-E3
Continuity mistake: At the part where Kirsten brings Ryan and Seth to help set up the hall, Seth starts to blow up balloons with helium. In one shot he has an orange balloon under his arm and is tying the bottom, and the next he's starting to fill up a different balloon, without time to finish tying it and pick up a new one. (00:15:50)
Revealing mistake: The phone message that Ryan leaves on Luke's voicemail is different to what he originally said, which is "I want to make sure you took care of it. Take care of it," but the message recorded is, "I'm just calling to make sure you took care of it. Take care of it." Also the background sounds from the club - the music, people talking, etc, are missing.
The Shape of Things to Come - S3-E2
Continuity mistake: At the beginning of the second episode of season 3, "The Shape of Things to Come," Summer, Marissa, Ryan and Seth are ordering pancakes at the restaurant. In this whole scene, Marissa's blue mug keeps changing position between shots.
Answer: He means that if Alex has to go so far as to forbid Ryan from seeing Marissa in order to maintain her relationship with her, their relationship obviously isn't working.