From the release announcement (http://www.kubuntu.org/news/12.04-release):
The Kubuntu community is proud to announce the release of 12.04 LTS, the Precise Pangolin: the new Long Term Support version of our friendly operating system.
See the Kubuntu 12.04 LTS Release Notes (https://wiki.kubuntu.org/PrecisePangolin/ReleaseNotes/Kubuntu) for a technical description including known issues.
Built on Ubuntu's core and polished with KDE's applications and workspaces, Kubuntu 12.04 LTS is a grand example of friendly, fast and beautiful software. We recommend it as the perfect OS for casual users, students, Linux gamers, software developers, professionals, and anyone interested in a free, open platform that is both beautiful and useful.