msycamore said:

Weird, those frames are definitely out of order. Great find D_M! What did they smoke when they mastered this one, so many odd anomalies in it.

I believe they used multiple film sources for the master of the JSC, as there colour differences and very slight size variations between 'matching' fields of a single frame, where the 'matching' field is captured from the same frame but seemingly from a different source. These fields tend to show up as mismatches due to the slight size or frame offset, and as far as colour differences go, one source seems to have an excessive yellowish tint to it and the other (and I believe less used source) seems to have stronger blues and more accurate colour.

If you skim through each field on a clean capture at pulldown pattern change points you will spot more than a couple of examples of this throughout the film, especially around Threepio and Artoo crossing the Tantive IV corridor battle, and before and after the Death Star chasm. Death Star walls turn from grey to grey-blue and back again, and faces go from jaundiced, to healthy, to jaundiced at pattern changes.

It seems like the creation of the master was a slapdash job, and it might explain why there are so many pulldown pattern changes.