Do you think the glue is positive, or printed in? I'm not sure because of the little white fringes, that suggests it could be inverted. But then the actual cement residue would have a slight blue color, which doesn't really make sense. The stuff starts out clear, and I've read stories of old cement turning yellow or brown in the bottle, so I'd assume that like many adhesive compounds, it would likely yellow as it dries?

Please re-check the ISR SWE, specifically the shot of Luke turning the lightsaber back on after putting on the helmet. Russ' capture of the '91 UK LBX VHS seems to lack them, but it's also dark, fuzzy, and compressed, so I can't tell whether the splotches are truly not there, or if it's just too obscure, like with the glue marks we thought weren't there but actually were.