The Phelps' front door changes in color from pink to green in different scenes.
When Jared parks his tandem bike outside the jewelry store, he leaves it on the ground unlocked to go inside the store. This would have let anybody, including the thief, steal the bike and take off with it. This was filmed in 2003 before the rise of bike theft became a big problem in Utah.
The bike that Jared rides has a horn, but when he rides down the driveway, the sound heard is a bell.
The crew and equipment are highly visible in the jewelry store where every wall is covered with mirrors.
When Jared's dad is talking with him in his bedroom, the crew is visible in the metallic light shade.
When Kirby is asking his parents for their permission to borrow their vehicle for his date, shadows of equipment from the filming crew can be seen in the glass of the framed picture on the wall.
In Jared's new bedroom, the boom mic is visible outside the window.