When Veronica and her mother are in the bar, her mother's hair switches parts, and between messy and smooth, in consecutive shots.
When Lianne tells Veronica what happened the night Lilly was murdered, she says that she knew Jake Kane was innocent because she was with him at The Neptune Grand. In actuality, she met Jake at The Camelot because it was less likely anyone would see them there.
Early in the episode, the "Neptune High" gym scoreboard is labeled "Mar Vista High".
Before the basketball game when Veronica (Kristen Bell) brings back the goat and the parrot you see Wallace (Percy Daggs III) is in a full Neptune high tracksuit. When he's told he can play he takes off his jacket, but he is already in shorts, and there is no sign of his track suit pants.
When Veronica is removing cookies from the oven she grabs the pan with both an oven mitt and her bare hand. This should cause a burn or at least a reaction to the heat. Wallace confirms that the cookies are hot when he attempts to eat one before they are cooled and burns his mouth.
When Wallace (Percy Daggs III) comes to the Mars apartment and discovers Veronica (Kristen Bell) baking cookies, he says he is there to pick up his algebra book. However, he walks out with just the plant leaving the book on the kitchen island.
In the beginning, when Veronica is searching her room for the bug, you can see a crew member in the mirror of the bathroom as Veronica is passing by it.
A subplot of the episode involves Veronica "flying" out to Barstow to find her mother. Veronica lives (according to the show's geography) between San Diego and Los Angeles. Drive time to Barstow from San Diego is three hours at night (when she would have left). The nearest commercial airport is an hour away from Barstow. Flying to Barstow makes no sense.
Veronica (Kristen Bell) describes Pan High School as being thirty miles inland from the Pacific. Yet later we learn that the trading area is halfway between the schools and "on the ocean". That would be fifteen miles inland.
Wallace (Percy Daggs III) is said to live on the corner of Pleasant Valley and Marigold, but in Cheatty Cheatty Bang Bang (2005), we see in the phone directory his address is 2414 Rialto Way.
Wallace (Percy Daggs III) is pleased that some anonymous admirer (it turns out to be Veronica (Kristen Bell)) has been leaving cookies in his locker. He should be worried that somebody apparently knows his combination and can get in at any time.