Homer's "NBC sucks" comments over the closing credits are not captioned.
Marge and Lisa are using different special clothes in the talent show. Marge is wearing a red sweater and Lisa is wearing a pink dress.
The car that Marge drives in this episode would appear as a car for Marge in The Simpsons Road Rage video game.
It is implied in "See Homer Run" that Homer ended up banned from the Zoo, possibly as a result of his actions in this episode.
Homer finds a three-chambered peanut where the three chambers are facing in different directions. Three-chambered peanuts actually do exist in real life, but the three chambers are actually all facing the same direction and are attached in the same direction as the chambers of regular two-chambered peanuts.
The Australian zookeeper is an obvious parody of Steve Irwin.
After a three-toed sloth was accidentally shot in the butt with a tranquilizer dart (intended to be for a charging rhinoceros), it briefly undergoes a jig mirroring that of Snoopy from the Peanuts franchise before falling asleep.
There was a subtle reference to South Park in the scene where Homer learns he bought the F-Series Canyonero by mistake: When his friends mockingly insinuate that he is homosexual, Homer yells "Shut up! Screw you guys!" before driving home. This was similar to Eric Cartman's frequent catchphrase "Screw you guys, I'm going home".
When all the teachers and staff members come out on stage for the musical in the beginning, there are nine people, when they form a pyramid there are ten people.
When Marge first used her headlights to see Bart and Lisa in the kitchen, Bart was wearing nothing but his underwear (and the chicken he wore as pants). But when Bart is stealing from Marge's purse, he is dressed.
The gag is also inconsistent with the layout of the house, and previous and later episodes have established that the room directly behind the garage is the seldom-seen rumpus room.
When Eddie the cop (as Curtis E. Bear) was being bludgeoned with 2x4's at traffic school, Krusty's nose was the same color as his skin before Agnes knocked Eddie down.
In this episode, Homer is disgusted enough by Mrs. Krabappel's balloon striptease to shoplift concessions as a result, but in "Bart the Lover" he was the one who drooled over her lingerie picture that she sent to "Woodrow".
When Homer is talking to Bart while Marge uses her new headlights, Bart's legs disappear when he is talking.
When Homer is driving in the Springfield Nuclear Power Plant parking lot, all the Canyonero windows are tinted, but when he starts talking to Lenny and Carl, the windows are transparent.