How-To: Install KDE 4.3 RC1 in Kubuntu 9.04 Jaunty Jackalope The first release candidate of KDE 4.3, the next major version of KDE4, was put out on July 1st and comes with new features and a lot of Plasma improvements and bug fixes. In this short tutorial I'll show you how to install KDE 4.3 in your Kubuntu 9.04 machine with the help of the Kubuntu Backports PPA (Personal Packages Archive) repositories.