Didn't know Cube was out on Blu-ray. I downloaded a 720p version to go with my imported French DVD, must've been ripped from that. By the way, the French DVD of Cube has the best set of features:

DISC ONE
*The Film
Audio Commentary by director Vincenzo Natali, writer Andre Bijelic and actor David Hewlitt
Storyboards/Film comparisons
Storyboards gallery:
- Mesh Trap
- Spike Trap
- Wire Twist Trap
Deleted Scenes with optional commentary:
- Missing Room
- Perspective
- Overhead Shot
Production Design Gallery:
- The Cube
- The Sets
- The Costumes
- The Traps
"Elevated" - short film with non-removable French subtitles (with optional commentary by director Vincenzo Natali)
Interview with Director Vincenzo Natali (in English with French subtitles - 3 mins)
Cube awards
Internet links
DISC TWO
Exclusive interview with Vincenzo Natali (56 mins)
"Around The Movie" - interviews with Derek Rogers (camera operator), Jasna Stefanovic (set designer), Bob Munroe (visual effects) and Andre Bijelic (writer)
Storyboard sequence analysis by Vincenzo Natali and Bob Munroe (11 mins)
Vincenzo Natali filmography (with trailers for Cube and Cypher)
Trailer and scenes from "Cube 2: Hypercube"
Theatrical Trailers