The mechanical clock on the wall in Nathan's office is broken throughout the entire series. It displays the same time in every shot that it appears.
Goof: When the cash register ringed for Dan's matches, the register read '$0.00'.
Rufus: (hollers) Dan Ashcroft! "The Rise of the Idiots". Awesome f*ckin' opinions, dude.
Ned: Yeah, well plastic.
Rufus: Laterz, dude.
Ned: Keep it foolish!
Dan: (food arrives) I'll get this.
Dan: Can I borrow a ten'er?
Claire: And what's 'Crashbat'?
Nathan: Okay, here's the credos. Trash...as in what's all around us. And bat.
Claire: What do you think of my proposal?
Dan: Yeah, very good.
Claire: Which bit should I start with?
Dan: Uh, the best bit.
Claire: Which bit is that?
Dan: Uh... the guy.
Claire: The guy?
Dan: Yeah him!
Claire: You didn't read it did you?!
Dan: I did.
Claire: Well what should I start my pitch with?!
Dan: The... guy.
A picture of Che Guevara is pinned on Dan's cork-board. Che was an Argentinian revolutionary who has become an iconic figure for rebellion in Western Culture.