When the She-Demon version of Elmora first appears before the Heroic Warriors on Phantos, He-Man is shown addressing her on his own, then in one shot the others are right behind him. After that he is alone again, then the others are shown in silhouette standing behind him and as soon as Elmore disappears, everyone has changed position once again.
When Man-At-Arms and Teela are trying out the new Photanium weapons, as Teela says "Okay, lets try it again", the gold strap on the right side of her tunic is flesh color by mistake.
When the Phantos guard fires his energy weapon at a disguised He-Man, the angle changes to a closer shot, but the background plate remains the same.
The opening shot is of the planet Eternia, but the story actually starts on the planet Phantos, also called the Moon of Phantos.
When the Evil Warriors first reveal themselves from behind a curtain, Strongarm's mechanical arm is on his left whereas his character model states it should be his right arm. It is on the right side in all subsequent scenes he appears in.