some people said (http://www.adom.de/forums/showthread...er-vaults)that only three types of greater vault (red dragons, undead, giants) exist in the game and my 1.1.1 memories tell otherwise...

Unluckily checking about 30 greater vaults gave - 10-red, 8-giants, 12-undead. (r60)

It would be nice to see other colors in there too.