Shortly after Bart played his joke on the Mapple customers by hacking into Mobbs' live feed, one of the employees yells "Who dares question the boss we fired 10 years ago and then brought back?" referring to Steve Jobs' initial firing from Macintosh in 1985 due to infighting with the then-CEO John Sculley over the direction of the company and his later being rehired by Macintosh in 1997 due to various failed business ventures during the 1990s.
When Comic Book Guy throws the sledgehammer into Steve Mobbs' image on the wall video screen (after Bart hacked into the newsfeed to play a joke on the Mapple Store shoppers), it is a reference to the "1984" Super Bowl commercial that introduced the Macintosh personal computer.
Homer mentions Osama Bin Laden.
Bart tries to use a MyCube to help in his escape from the store, and all that happens is that the MyCube plays music. The song it plays is Lovin' You by Minnie Riperton.
Lisa owed Mapple $1200 for downloading 1,212 songs, which cost $0.99 (or $1.00) for each song. 99 cents per song = $1,199.88. 101 songs would cost $100.
This is the second time Bart uses a microphone. The first one was Radio Bart.
When Homer runs into the old Springfield Mall if you look closely Hans Moleman can be seen to his left. But when the Duff truck crashes and Homer swims to save the beer, he's trapped in the truck.
When Krusty gives Lisa the MyPod, and when Lisa shows her music to Sherri and Terri, her MyPod is like the iPod Classic. But when the three of them watch the exclusive episode of Itchy & Scratchy, her MyPod is like the iPod Touch. The giveaway is that there are no buttons in the center, and the homescreen has apps.
When Homer is flying on the magic carpet, he is covered in his blanket, but when the camera zooms out, his blanket is gone.
When the Duff trucks crash and Homer swims to save the Duff, one of the trucks is a double trailer, but both of the trucks that went off the edge of the bridge only had one trailer.
When Bashir leaves the dining room if you look closely you can see that his eyebrows disappear.