Continuity mistake: At Edoras, Aragorn's sword leans against the wall, significantly lower than the circular carving above it, as Pippin walks toward Gandalf. However, when Merry asks, "What are you mad?" the hilt now reaches near the top of the circular pattern. Then when Gandalf grabs the blanket to cover the palantir, the sword's height is the same as in the first shot.
Picture edited by Super Grover