I saw that blown up to 70mm 1967 widescreen version. At the time, I wasn't sufficiently familiar with GONE WITH THE WIND to be horrified by the compositions or the lack of color consistency. Now, being thoroughly familiar with it, I wouldn't mind seeing that one again just to be suitably mortified.
That was when I first saw the film, during the 1967 widescreen re-release. I don't even remember it being widescreen. I'm sure I didn't notice anything at the time as I didn't know then how the movie should look. And I was used to seeing movies chopped up on TV.