KDE 4.12.2 was released two weeks ago. Now it’s available in the Kubuntu Backports PPA for Ubuntu 13.10 Saucy.
KDE 4.12.2 brought more than 20 recorded bugfixes include improvements to the personal information management suite Kontact, the UML tool Umbrello, the document viewer Okular, the web browser Konqueror, the file manager Dolphin, and others. This release also included an updated Plasma Workspaces 4.11.6.
Upgrade / Install KDE 4.12.2:
Press Ctrl+Alt+T one your keyboard to open the terminal. When it opens, run the command below to add Kubuntu PPA:
sudo add-apt-repository ppa:kubuntu-ppa/backports
Update package lists and upgrade KDE:
sudo apt-get update sudo apt-get dist-upgrade
If you’re going to install Kubuntu Desktop, run below command after updating package lists:
sudo apt-get install kde-standard kubuntu-desktop
Tips: The binary packages will soon be available for Ubuntu 12.04. By then, you can run previous commands to upgrade KDE in Precise.