While some, like myself, like to walk on the bleeding edge and install KDE 4.0.1 despite its shortcomings, others rather stay with established and mostly bugfree releases.
For those, KDE 3.5.9, a new maintenance release, has arrived without much buzz. The release announcement can be found here:
http://www.kde.org/announcements/announce-3.5.9.phpHave fun!
Uwe