Revealing mistake: When they are escaping in the beginning of the episode, watch Rodney dial. As he finishes, one of the DHD address panels pops out and falls off.
Revealing mistake: Season 2, episode 2 "Virtu-Date": When Pim is jumping rope with the girl, she is building a card house. When she jumps you can see the tape holding it together.
Revealing mistake: When Syrus and Bastion walk onto the arena field to congratulate Jaden, there are extras animated in the background who are cheering yet appear frozen and not moving in any way. (00:18:24)