Packages for the release of KDE’s Plasma 5.4.3, bugfix Release for November, are available for Kubuntu 15.10. You can get them from the Kubuntu Backports PPA.
Please report any bugs you find. Bugs in the packaging should be reported on Launchpad. Bugs in the software should be reported to KDE. Or ping sgclark in #kubuntu-devel.
To update, follow the Software Repository Guide to add the following repository to your software sources list:
Special thanks to sgclark for packaging this update and to testers who hang out on the #kubuntu-devel IRC channel.