In an overhead shot of the basketball court, the key is International-style in which the paint is wider at the baseline than the free throw line. In a later shot at ground level, the key is switched to the American-style rectangular shape.
When Meg opens the Bible in the car, she opens it upside down.
At the end of Peter's speech at the Quahog African American League, several members approach the podium to applaud him. The man second from the left is clearly Caucasian. This doesn't make sense since Peter, being Caucasian, caused a disturbance amongst the African-American members to illustrate the point that he was the only white guy in an otherwise black group.
Brian reads aloud an excerpt from the diary of Nate Griffin: "I was brushing down Lucy, the new colt, when she let out a fart right near my face. So I took her head and stuck it by my butt and blew a huge fart right back at her.".
"Colt" is the term used for a young male horse specifically (a young female horse is called a "filly").