Other mistake: During the subway scene, when Dorothy, Tin Man and Scarecrow are trapped behind the red fence, there is no lock on the door in the fence. The door bounced once before falling shut, so it's probably not stuck. So how are Dorothy, Tin Man and Scarecrow unable to push it open?
The Wiz (1978)
1 other mistake - chronological order
Directed by: Sidney Lumet
Starring: Michael Jackson, Diana Ross, Nipsey Russell, Ted Ross
Visible crew/equipment: As the Tin Man gets to the end of his song, he's dancing in front of three mirrors. If you look past him as he's centered in the middle mirror, you can see the camera lens looking out of the canvas at him.
Evillene: I'm allergic to water! It makes me melt.
Trivia: During the Munchkinland sequence, if you pay attention, you will notice that none of the very young Munchkins appear until the musical number starts. This was most likely to save shooting time, since children are not allowed to work for more than four hours a day.