During Orko's knighting by Queen Marlena, He-Man is sitting on the steps to the royal thrones. When he calls Orko over to talk to him, Queen Marlena is no longer standing in the background. But she returns to her usual spot during the final wide shot.
When Skeletor is using his view screen to scan Eternia, the panning shot reveals the unpainted side of the Evergreen Forest background plate.
As He-Man first confronts Aremesh in the Evergreen Forest, he is animated to be holding his sword, but is not holding it.
In two separate scenes, Orko hides behind Battle Cat at the Royal Palace, but the Trollan is drawn much too large in comparison to the mighty cat.
The Sorceress appears in human form in the Tar Swamp despite not being able to manifest herself outside of Castle Grayskull.