poita said:

There is a bunch of stuff that looks a little weird, and I don't think it is a compression artefact.

Mostly in high contrast areas, like R2 here against the background, it is like he has after-images to the left and right of him. Any idea what this is?

That ghosting is probably on the original print, because you can also see it on the GOUT. It is just much clearer here...

Team -1: http://www.thestarwarstrilogy.com/image.axd?picture=/2015/06/StarWars.Frame.00026265.png

GOUT: http://www.thestarwarstrilogy.com/image.axd?picture=/2015/06/StarWars.Frame.00026265-GOUT.png