I don’t think Threepio’s silver leg in the OT ever got this much scrutiny. 😉
Actually it did…as during the scene where R2 is ‘welding’ the seated one-legged C3PO aboard the Falcon towards the end of ESB, it turns out that for some reason he’s suddenly got a GOLD front shin section on his otherwise SILVER right leg…whereas before and afterwards his right leg has SILVER front and back sections as normal. 😉
I mentioned it on adywan’s ‘ESB:Revisited’ thread yonks ago, but I don’t know if he can do anything about it or not.