CapableMetal said:
the Reivax broadcast is missing 15 sequential frames during the Ben/Vader duel alone!

Not 15, it's 50! (132114-132163)

I wonder if the laserdiscs have the same frames missing.

Over the past weeks I've been comparing US & Japan LD captures.
Not my own caps-- I don't own those LDs, but ones available on usenet.
Both sources are raw 29.97fps pulled-down which is good from a certain frame-counter's point of view.
Lots of IVTC'ing ensues and by this point we got sync scripts for US trilogy & Japanese sequels.
US & Japan have different side breaks in some cases, which is also good for frame-counters like us.

Looking back at some notes from Sept, the US ANH LD lacks
85225-85226
147671+147672
and it's missing one field of 162630.

Should be able to provide more specifics for sequels in the coming days.
Earlier in the thread I agreed with msycamore about inserting 75305 into ESB.
After noticing variation between US & Japan versions I've had some radical new idea about that.
If we're to believe the audio evidence, perhaps two frames are missing instead of one.
I need to present that evidence here.

ROTJ frame counting is finished but I haven't done any audio analysis of that one yet, so I can't comment on msycamore's proposed numbers.