KDE 3.5.1 was released today, featuring fixes to over 150 reported bugs and many other small improvements making this the most stable and feature-rich Unix desktop ever. Konqueror, KMail, KPDF, Juk, Kopete, Kalzium and Quanta in particular saw a large number of improvements in stability and performance. Users are encouraged to upgrade when their distributor releases packages. There are updated packages available for Arch Linux, Gentoo, Kubuntu, Red Hat and Slackware or you can compile it yourself with Konstruct. See the 3.5.1 Release Announcement for full details and the Changelog for a full list of updates.