Bernadette mentions that Howard only has one long chest hair. But later, when she shows him her Cinderella costume, he strips off his shirt and his chest is full of hair.
In this episode, Sheldon addresses Amy on the cellphone (and she refers to herself) as "Doctor Fowler." However, in other episodes, she is addressed/referred to as "Doctor Farrah Fowler." It is therefore never clear whether Farrah is part of her surname or one of her given names.
If you are over the age of 12, and visiting Disney properties, you are not allowed to dress in any sort of costume at all. Disney doesn't like older teens and adults dressing as characters lest young kids mistake them for the real characters.
Guests to the "Bibbidi Bobbidi Boutique" must be between 3 and 12 years of age.
When Lucy walks into the library and Raj starts texting, she immediately reaches for her cell phone before Raj indicates that he wishes her to do so. She would have had no idea he was texting her and should not have reached for her cellphone before being requested to.
Penny asks "We're not just going to get drunk and go on rides?" at Disneyland, which at the time of the episode's production and airing did not serve alcohol within the park other than in the members-only Club 33.