one thing that really bothered me is that right when obi and vader jump out on the catwalk thing, both are are trying to stay balanced and then suddenly one of those lava droids comes up in the right corner and make some noises, looks at them, and then flies away. It completely ruins the tension... it's just another "hey look, more cgi" moments.... it could be cropped out... so the focus stays on the duel and not the wiz-bang enviroment.... just food for thought.