Awesome, thanks!
Well, roughly doing my maladjusted TV simulation on this laserdisc frame (as on the HD & DVD, above) ..
.. it confirms my reflection and SilverWook's mention -- that's the way of doing things on film. That plus Kubrick's production team using multiple exposures of self-matted elements to produce 1st generation special effects on the original negative. Little wonder it reveals itself when pushed out-of-bounds. Actually, that's a good thing for a retification. It makes finding misalignments a task as easy as bumping up the gamma. (I love computers!)
As an aside, I tried Taschen-izing this shot (see Page 4). Before, it had no stars (not really, but it looked that way). After, ..
.. the stars show normally. This confirms to me the laserdisc needs that brightness / contrast boost to be accurate.