The 20th anniversary DVD is still one of my favourite home releases. One of the best uses of interactive DVD menus.
Having a close look at the main menu screen (when it first starts up), I spotted what looks like a subliminal image, of one of the guy's responsible for the production of the 20th Anniversary DVD (also the ALIEN / ALIENS Laserdisc boxed sets from the early 1990s).
It looks like a subliminal cameo. It's a flash frame of someone with a beard ... you'll have to be quick to spot it.