Mayor Dixie's mouth doesn't move when she christens the replica Mayflower.
In the play scene, when Helga is complaining about her family, it shows a close up of Phoebe. But the background is Helga's living room, not backstage.
At the end of the play, when everyone takes their bows, Helga withdraws her hand from Arnold's, but in the next shot, they are holding hands again.
When Arnold asks Grandpa why they go along with Grandma's holiday plan every year, the animation loops. Shortly after, when the grill fires up again, there is a change in the background.
While Arnold and Helga are out in front of Holiday's Home Furnishings, Arnold's left hand is missing in a couple of shots.
When Helga and Arnold represent themselves on Simmons' Thanksgiving, they already have places where to sit with pre-set cutlery and plates, although they weren't expected.
After Simmons puts his hand on Arnold's shoulder while in the kitchen, the sound of stuff breaking is heard, and his hand disappears from Arnold's shoulder before reappearing in the next shot.
In the credits, layout designer Claudia Stegall is credited twice, Mary Scheer is credited for voicing Suzie despite her not saying anything, and Craig Bartlett is not credited for "voicing" Brainy.
