Just how many versions of the Feng Shui Rulebook have there been?
Bit complicated this one. First printing was the colour Daedalus run that is an absolute feast for the eyes (but falls apart within weeks), this was released in 1996. When this sold out they ran another print run, but this time in black and white with some revised rules (detailed in this FAQ) and character clarifications, this was published (I think) in 1997. The Atlas Games version is a re-run of this second printing with a couple of very minor changes to the text and (mostly) new art.