I didn't see this specific shot mentioned on page 1 or any of the hundred or so pages I read through so here's my $.02: Apparently, this shot got flipped in favor of screen direction, and maybe most viewers miss the gaffe because Luke's upside-down, but it has always bugged me.
Either paint in the left hand (and erase the right, like Ady did for Vader's gesture in ANH) for the 6 or 7 frames it should be there or flip the image..