Existing users, 
Apple's website indeed shows the new Safari 3.1.2 available for download:
http://www.apple.com/safari/download/
HOWEVER, the download results in the older v3.1.1 software.
So... from Apple.com, you cannot download the latest version directly.
Apple Safari
Browse the Web with speed and an elegant interface.
Version: 4.0.4
Apple Site: Incorrect Download Link!
Feedback Type: Review
Contributed by: tliszt Tuesday, July 01 2008 @ 12:20 AM PDT
Product Platform: MacOSX
Used Product For: Have Not Tried
Comments
Apple Site: Incorrect Download Link! - rricks1
I agree. I does indeed say v. 3.1.1And when I try to install it, I am told I require MacOS 10.5.2 or higher to install. I was running 10.5.3 and just installed 10.5.4. Same thing. It won't install. Hmmmmmm RR
Tuesday, July 01 2008 @ 11:10 AM PDT
Apple Site: Incorrect Download Link! - fazzari
It appears that since Safari 3.1.2 is part of the OS X 10.5.4 update, Apple currently doesn't provide a separate Safari 3.1.2 Leopard installer, although they do provide a Safari 3.1.2 Tiger installer. Their web page does not make this clear - it claims it will download Safari 3.1.2 and gives you the choice of Leopard or Tiger. If you choose Leopard, you get the Safari 3.1.1 updater.Tuesday, July 01 2008 @ 01:21 PM PDT
Use Apple SW Update instead? - Eric M
You'll always get the correct version for your setup, and remember you always have the option to download only (and not install via SW Update).Reply to This
Tuesday, July 01 2008 @ 09:51 AM PDT