As Lorelai walks through the town, her sweater sleeves are outside the cuff of her coat. When she walks into Luke's, they are tucked inside her sleeve. They reappear when she enters Luke's apartment.
When Lorelai and Luke are in the church to break the bells, the crowbar that Lorelai is holding changes position between shots.
When Rory is in the cafeteria, she has a tray of donuts which she sets on a table before she talks to William. However when she walks away, she doesn't take the donuts with her.
Lorelai's hairdo slightly changed from scene to scene when she was arguing with Luke in the church. One take had it in front of her ears and the next one it was behind her ears, then in front again.
In the opening scene, after the credits, when Zack and Gill are singing, the camera shoots to Zack and you can hear Gill. When the shot goes back to Gill, you can still hear him, but he isn't even singing in that brief second.
Rory states that she hates mushrooms. However in Keg! Max! (2003) Rory says that she thinks mushroom caps are really good. Is it possible for her to hate mushrooms, but like mushroom caps?