Other mistake: At the start of the episode we're shown a preview of the episode's plot: while Fred stretches his leg on the ballet bar his leg gets stuck and when the ballet teacher pushes his leg down, the part of the ballet bar which Fred is leaning on is gone. What's odd is that during this scene within the episode the ballet bar is perfectly intact. (00:00:25 - 00:14:40)
Continuity mistake: When Fred is reading his letter about his position being accepted at the Stone Valley Inn, you can see Wilma is sitting in the chair next to him, but in the next shot the chair is empty and Wilma is nowhere to be seen, then she reappears in the chair.
Continuity mistake: After Fred and Barney leave for the hospital without Wilma they realise the mistake and head back to the house, and when it cuts to Wilma in the bedroom Dino jumps atop the blue blanket on the bed, but in the next shot the blue blanket is gone, and then it reappears for Dino to hide under. (00:16:35)
Continuity mistake: When Fred and family start their drive toward Jellyrock Park, the trailer has one window and a door on its right side (behind Wilma's side of the car), but when they reach Jellyrock that side of the trailer now has two windows and the door is gone. (00:11:50)