Goofs

When Sam Hawkins takes a bath, his gun is leaning against the wall of the house. He takes the gun and lays it across the bathtub. Yet, in the next shot, the gun is leaning against the wall again.

Apanatchi's hair suddenly got longer and darker when she changed into the Native American clothing Winnetou gave her.

During an attack, some of the footage of the native americans was edited into the movie from Winnetou (1963), including a shot which had Winnetou's dead father in front.

Time and distance errors. Curly Bill's gang should not have gotten ahead of Winnetou to set up an ambush. They also shouldn't have been able to sneak up on an Apache camp, especially when their arrival was expected.