For more information on the final Ubuntu 12.04 release:
Bugs in Precise
It should come as no surprise that the releases of Precise pangolin will contain bugs. Your comments, bug reports, patches and suggestions will help fix bugs and improve future releases. Please report bugs per the instructions on ReportingBugs.
If you want to help out with bugs, the Ubuntu Bug Squad is always looking for help.
If you would like to help shape Ubuntu, please take a look at the Ubuntu Get Involved page.
To have future Ubuntu development announcements emailed to you, please go to the ubuntu-devel-announce page and subscribe with your email address.
To have future Ubuntu package updates emailed to you, please go to the precise-changes page and subscribe with your email address.
More Kubuntu information can also be found at Kubuntuguide.