After installing 10.4.6 on a dual G5 & G4 iBook, any of the Macromedia MX 2004 suite (Dreamweaver/Fireworks etc) would not launch. Reinstalled Dreamweaver & OSX, did the various fixes with no luck. Older version of Dreamweaver was OK, but I went back to 10.4.5. Other aspects of 10.4.6 were OK...