When Rory speaks with Lane from the pay phone in front of the school, there are several teenagers hanging out around her. When Lane looks through the telescope and tells Rory that there is something in her teeth, the shot is much wider and we see Rory completely alone. Then the shot returns to a closer frame and we see the other teenagers again.
When Christopher and Lorelai are in the Diner, Rory's mug suddenly appears on the table.
At Friday night dinner, Chris tells Emily and Richard that he has gotten a Volvo and does not drive his motorcycle a lot anymore. Richard compliments his choice and Lorelai adds that it is perfect for "cranking Metallica", referencing the scene from "Presenting Lorelai Gilmore" (S2E6) when Chris showed up in the Volvo for the first time. Except that he cranked Rammstein, not Metallica.
When Paris is arguing that Oregon, at the time, was the only state to offer doctor assisted suicide, she erroneously called it the 'Death Without Dignity Act'. It is actually called the 'Death With Dignity Act'.
At Luke's, Christopher and Lorelei are discussing Christopher's involvement in Rory's life. Many times, he mentions only the *15 years* of being a part of his daughter's life. However, Rory has 2 birthday parties, celebrating her *16th* birthday in; Season 1, Episode 6; Birthday Parties.
When Paris is telling Rory the problems with dairy for the debate, she asks if Rory has had any dairy in the past 48 hours and Rory says she had milk on her cereal that morning. However, Lorelai and Rory were seen going into Luke's diner for breakfast that morning and it's doubtful Rory would get cereal at the diner.
Christopher & Sherry go back to the Gilmores' house after the debate. When asked what they would like to drink they both ask for water but inexplicably Lorelai prepares apple juice.
When Rory and Lorelai are hurriedly cleaning up the house before Christopher and Sherry come over, Lorelai reminds Rory to clean up her room, and reminds her that Sherry wants to see the books. Lorelai is then seen throwing her coat into a room off the kitchen, which is Rory's room. Even though Rory was planning on going in to clean up her room, Lorelai throwing her coat in there makes the cleaning more difficult for Rory.
When Christopher and Sherry are in Luke's talking to Lorelai about the Friday night dinner, a boom mic briefly appears above Sherry's head.