Jonathan Riddell has announced the availability of the second testing release of Kubuntu 13.04: "Welcome to the 'Raring Ringtail' Alpha 2 release, which will in time become the 13.04 release. Highlights: the latest release of KDE's Plasma Workspaces and Applications 4.10 adds a new screen locker, Qt Quick notifications, colour correction in Gwenview and faster indexing in the semantic desktop; Kubuntu should now be able to support UEFI Secure Boot, a standard for controlling what software can be run on a computer; includes the 3.8.0-6.11 Ubuntu Linux kernel which is based on the the upstream 3.8-rc6 Linux kernel; 13.04 is distributed with an updated default toolchain that includes GCC 4.7.2 and eglibc 2.17; OpenJDK 7 is the default Java implementation...."
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Release Announcement
Release Notes
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