The scene on Dagobah when Luke is fighting Vader - the stabilization script caused the scene to be very jerky, especially during the close-up of Luke with his saber just before and just after Vader's helmet explodes. It was probably due to the slow-motion effect in that scene. G-force just revised the script so that it's now "off" during that scene.
It was discussed here:
http://originaltrilogy.com/forum/topic.cfm/GOUT-image-stabilization/post/371302/#post371302