Other mistake: At the start of the baseball game, the announcer says that the Gas House Gorillas are the visiting team, yet on the scoreboard they are shown above the Tea Totallers.
Other mistake: When Sam tries to bring Bugs down from the crows' nest/elevator, he pushes the "Up" button and brings it down.
Other mistake: During one scene where Bugs Bunny is barbecuing his carrot on a skewer near the fireplace, the carrot incorrectly appears behind the flames of the fire.
Other mistake: When the captive begins her escape, she kicks the bed through the orange portal offscreen, but the portal only starts about a foot off the ground, so the bed would have hit the wall, rather than have gone through the portal.
Other mistake: When Sylvester is looking in the mirror whilst trying on hats, one of the hats has a price tag on it which reads $105.95. However, you can see the price numbering is the right way round - it should be back to front.
Other mistake: When Daffy is helping the guest to his room, he looks at his keys as to which one would open it. When he finds the right key, he somehow manages to open the door without unlocking it.
Other mistake: In the opening credits, Tom O'Loughlin's surname is spelt as "O'Laughlin."