The final KDE SC 4.6.x series maintenance update, 4.6.5, has completed our QA process and been released to natty-updates. It will be coming soon to a mirror near you.
This release brings no design or feature changes. It is a pure bug-fix update from the KDE SC people are already experiencing in 11.04. Note: Due to late release, the kdepim suite was not updated to 4.6 for the 11.04 release. This has not changed and these packages are not included in this update.
Read more at Kubuntu