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.
The O.C. (2003)
1 mistake in The Dearly Beloved
Starring: Peter Gallagher, Adam Brody, Mischa Barton, Kelly Rowan, Ben McKenzie
Kirsten: Is everything okay?
Seth: Hmm? Yeah, it's fine.
Theresa: I'm pregnant.
Seth: Well, except for that.
Trivia: Adam Brody originally auditioned for the part of Ryan Atwood.
Question: When Ryan goes to Marissa and Alex's apartment (after Alex told him to stay away from Marissa), he says, "If you have to work this hard, it isn't working." What does he mean?
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.