In a page of a book detailing how to take care of Music, it lists her communication tablet as a item of comfort. She does not own this tablet until Ebo teaches her how to use it later in the film.
Zu has a scar from falling down from a fire escape. This only appears for one shot and cannot be seen at any other point in the film.
After Music's first meltdown in the film, she, Zu, and Ebo leave the complex to take her to the library she often goes to. She's shown without her fanny pack in this scene, although she never leaves the apartment without it in any other scene.
George holds a grudge against Zu for breaking into his apartment and falling off the fire escape five months prior to the start of the film. When he's seen talking to Zu from his window, there is no fire escape attached to it.
Zu has a tattoo of some sort of line running up her left arm. There are several instances where she does not have it.
In a scene where Ebo plays the piano and has Zu sing the song "Music", the camera is noticeably wobbling.
At about 1 hr 5 mins, during "Could I Love With No Fear", the camera is out of focus for a moment.