Continuity mistake: This episode establishes that Lily was born at the Live Aid event, which took place in July 1985. In the show's final episode, "Hello, Goodbye", Brad and Lily are graduating in 2005 (see the "congratulations" banner in a hallway at their school). Being born in 1985 would mean that she is graduating at age 20. It is highly unlikely that she failed and repeated two of her school years. Brad, who is the same age, is graduating with her, and he is a dedicated student.
Continuity mistake: In this episode, Lily's golden sprite tattoo is underneath the name "Dean" - "Dean" is written above the sprite's head, between the tips of her wings. A few episodes ago, at the end of "Your Father Shoulder Know - Part 2", Sean hugged Lily and accidentally lifted the back of her shirt, revealing the tattoo. The name "Dean" was not there.
Continuity mistake: In this episode, Claudia states that Eddie has never had a job for as long as she has known him. But in the episode "Don't Fear the Reefer", flashbacks show her hanging out with Eddie and Sean during their pot-smoking days, and also show Eddie working at a pizza parlor.
Continuity mistake: In the episode where Eddie first gets his blue electric car. He plugs the car into the kitchen with a long red extension cord. When there's a shot of Claudia first coming out of the kitchen to see what's going on, the red cord is gone. The whole kitchen entrance is shown, so the red cord should be visible. Then, when Eddie and Shawn are shown again, the red cord is back on the floor behind them.