Darth Mallwalker said:

Do you mean the quote from JayArgonaut regarding Lando's line?
IME that's describing a difference between the THX mix vs. its predecessors,
not a difference between 1478-80 & 1478-85.

So I'd forgotten about the UK PAL 1478-80, which shares the same catalog number with it's domestic counterpart. That confuses the discussion.

The NTSC 1478-80 pressed by Pioneer in Carson, California has copyright (c)1986 (not '85) and it Shirley contains a digital track. I'm holding it now.
I've got a hunch that's the one d_j captured too.

As for the actual contents of the PAL 1478-80, that's still up in the air it seems...

Yeah I think I was confused about a discussion on the dual audio options on 1425-84. All these catalog numbers can be confusing. :p

Msycamore: The 1995 track has bits from the mono mix added into it, IIRC. I didn't know the 1993 release was THX certified though, thanks. They made such a big deal over the 1995 audio because it was THX, I thought that was the first instance.

Also, cool 70mm links, could be useful.