Corrected entry: In the opening credit sequence, as the riders are galloping triumphantly across the mighty windswept plains of yore, you can see power lines in the background.
Corrected entry: Malak tells how his "cousin's sister's brother" dug a passageway under the waterfall to escape Shadizar. Any sibling of Malak's cousin would also be Malak's cousin (or at the least, half- or step-cousin) and entitled to the same designation.
Corrected entry: In Toth-Amon's icy castle, Conan walks into the room where the jewel is being kept. A mirror then descends and blocks off the doorway from the other heroes. Instead of trying to lift it (as Bombaata did), why didn't they just smash it and follow Conan in? After all, that's exactly what they did later on after Conan defeated Toth-Amon.
Corrected entry: How did the heroes close the big dragon mouth after crawling inside to escape the crypt guards? There did not seem to be a switch or lever inside to perform such a function, unless the mouth closed by itself, which isn't very likely.