During the chase scene when Tamara flees the temple, Conan's sword repeatedly disappears and reappears in between shots as he pursues Remo.
During the chase scene; just after Tamara disconnects the coach that she was riding in from the horses that she is now riding, you see the coach tip forward, roll and shatter apart. In the next shot the coach is whole again and lands on the front and shatters for a second time.
During the fight on the ship, it starts of being night, but ends being with the sun out.
Crew or equipment visible
During the fight on the ship, Conan is thrown back onto a raised platform in the cargo hold. When his legs fly up you can see the rubber soles of the athletic shoes built into his leggings at 1h:12m:28s
With no apparent way of knowing where Conan's ship has laid anchor, and with no way of knowing that Tamara would be on land with Conan and not still aboard the ship, Zim's soldiers nevertheless are able to set up a perfect ambush to try and capture Tamara after she leaves Conan's chamber and wanders through the forest.
When Tamara is ambushed by Zim's men in the forest, she does not notice the first rider until he is only a few yards from her, despite having a very clear line of sight for a few hundred yards in every direction, and despite there being no noise louder than birdsong to mask the thundering hooves of a galloping horse. Similarly, the foot-soldiers were quite clearly not lying in wait - the trees in the forest are too skinny for them to have hidden behind and there is no other cover around - yet they are upon Tamara within a couple of seconds of the horseman attacking.
When Conan and Tamara are waiting for Khalar Zym at the Outpost of Shaipur, the actress playing Tamara is replaced by a body double in two blurred shots. Her hair and height is the same, but her facial features are slightly different.
During the fight with Zym, Conan falls backwards onto an obviously rubber rock.