Anybody else hate that shot of Vader stepping on Obi-Wans cloak after he kills him? Like he's goin' "HUH?? Where'd he go, George??"
This is the same guy who helped the Empire bring the Jedi to near extinction and he hasn't seen that happen before? Doesn't seem right to me.
I know a shot needs to be there to show the audience that Ben did in fact disappear, but I'd really like to see a new shot of the empty cloak hitting the ground replace that one.

Or maybe I've got it all wrong. I don't know the PT or EU, so maybe that was the first time a Jedi "became one with the force" (giggity) and Vader truly didn't know what just happened.