After 4 pre(beta)-releases, the full version is finally out. Anytime they increase the second number, you know it's got to have tons of updates to it. The main ones include
-
GD library is now bundled with the distribution
-speed improvements in a variety of string functions
-and
TONS of other fixes, updates, new functions, etc
Server Admins get it
here
Offical Release Announcement is
here
ChangeLog is
here