Home Theater Forum had a chat with BTTF producer/co-writer Bob Gale on January 21.  Below is are some excerpts about the misframing.
http://www.hometheaterforum.com/files/gale.txt
<Benjamin_Dorsey> There has been talk in forums like this about mis-franming in 
parts 1 and 2, did you help universal along to correct it?
<bob_gale> The framing issue was first brought to my attention by someone in 
Australlia where the DVDs were released in September.   For whatever reason, 
Universal never sent me check disks after the mastering, so this was my first 
inkling of it.  I got an email about it around Thanksgiving.  I went ballistic 
and came down on everyone at Universal to explain it.  Near as I can 
understand it, some idiot in the transfer house lined up the 1:85 mattes 
with the hard matted ILM 1:66 mattes.  My fault, for not insisting to look at 
the 1.85 transfers, but this is one of those things you assume is idiot proof.
I've done this many times, and every other technician knows you lay the 1.85 
matte from the center.  It never occurred to me this would get screwed up.
Well, it did, we caught it, thanks to people like you all on this forum, and 
the new versions are supposed to be finished at the end of this week.  You 
can be sure I will check them!
[later on]
<BrentJ> Hello, I'm sorry if this has already been asked, but I couldn't find it anywhere. 
Will the fixed BTTF dvd's be released to stores?If so, when can we expect them and how can 
we make sure that we don't get the originals? Thanks for your time! 
<bob_gale> When the initial run of the DVDs has been sold, the new versions will be the 
only versions available.  I don't know what they'll put on the box to indicate this. 
But if you have the original pressings, Universal will replace them with the new ones 
when they're available.  The official website should have the number to call, and 
BTTF.com will have the correct info.  The new pressings will not be availble until 
next month -- probably late in the month.  The remastering is supposed to be finished 
this week.  The new pressings will also have letterbox versions of the trailers.
Why they put the fullscreen trailers on the widescreen editions is beyond me.
Edited By DragunR2 on 1043952063