In the preservation section, Belbecus has a thread about the making of the '93 mix, quoting an article interviewing a recording engineer who worked on the mix, who stated that the mix is primarily derived from the six-track 70mm, with additional sound effects added by Ben Burtt, most of which were taken from various foreign language mixes made in late '77 and '78. The exploding glass sounds most likely fall into this category, and are therefore nearly 'original', just not for mixes used in any English-speaking countries. They're not on the French of Spanish tracks included on the GOUT dvd, but these would probably have been among the first foreign tracks made. The glass may not have been added until later for some more obscure language. We'll probably never know for sure . . .
I've become more accustomed to hearing these sounds, from repeated exposure to the '93 mix, but I still prefer them to not be there. But that's where Belbecus' upcoming release of the original stereo and mono tracks will come in handy, so we can make custom dvd's according to our own sound preferences. I can't wait.
