In the title card, Cosmo writes from Da Rules into "Cosmo Rules" with a crayon.
This episode reveals that rule free wishes are controlled by Da Rules which means that rule free wishes cannot be done unless Da Rules allow them to be done under certain circumstances. If Da Rules is not able to control the said wishes due to no rules in the book, it will start to destabilize and if it gets destroyed by the rule free wishes then the universe is destroyed too. Da Rules may also have control over the rule free muffins since whenever someone uses it to make a wish, nothing bad happens.
David Copperfield - When Jorgen hiccups after Wanda tries to scare him in a sea-monster form, Jorgen mentions that he had made The Statue of Liberty vanished, which is a reference to when Copperfield makes the infamous trick in 1983.
The railroad tracks don't have any spikes. Also the locomotive is missing its knuckle couplers.
It's impossible for the Statue of Liberty to be able to fit into the living room. Jorgen may have caused a bigger living room with it or caused the statue to be smaller offscreen.
Before Jorgen says that the Statue of Liberty disappears, the sky is red. But when Mr. Turner says "Honey, the Statue of Liberty is in our living room again", everything is normal.
When Jorgen says "And here is the really back part; if the book explodes, so the universe!" Timmy' eyebrows are colored the same brown' scheme as his hair.
When Nana Boom-Boom calls "B-7", original captions say E in place of B.