Question:
Have you seen anything about why some of the audio was changed?
I noticed one of Hoggle's lines in the oubliette was different and the song with the Fireys sounded flat.
You are sin.

Review is in, better image quality than most 35mm titles.
http://www.blu-ray.com/movies/Labyrinth-Blu-ray/145722/#Review
Brian Henson:
Using the original 35mm camera negative as the source, the film was scanned and fully restored at 4K resolution.This resulted in a significant increase in detail, color and vibrancy key elements to the film's unique and sophisticated visuals, from the layers in Jareth's costume as he starts Sarah on her adventure to the intricate features of the goblins that inhabit the labyrinth itself. It has been exciting to bring the look of the film back to how it was originally intended if not better! Using both the color detail from the negative and my father's personal print of the film as a reference, we were able to carefully match the look and feel for each scene throughout.

Much better than the '09 release.

There is usually a review with HD screenshots at
http://www.blu-ray.com/movies/Labyrinth-Blu-ray/145722/
, but not yet. The user review says better quality than original blu-ray.

Interviews with the cast
A memoriam for David Bowie
It did.
You are sin.

I was hoping the special features would include:

1. Deleted scenes
2. Interviews with the cast
3. magnas from You Tube
4. Upcoming movie trailer.
5. A memoriam for David Bowie

I might buy it.
"I write songs, you just never let us play any of them!"-Fluttershy