After Luke and company land on the Moon of Endor and meet up with the Ewoks, they go and try to find a way to the deflector sheild's controls. When they are outside the control room's access doors an ewok jumps onto a speeder and zooms off; two of the three Storm Troopers in front of the doors following. Then when Han goes and taps the last Trooper on the shoulder you can see that part of the Trooper's leg armor is missing on both legs . At least this slip-up was on the old version of The Return of the Jedi.