Updated kdelibs packages fixing a security problem, some memory leaks and some minor bugs are available.
kdesu created a world-readable temporary file to exchange authentication information and delete it shortly after. This can be abused by a local user to gain access to the X server and can result in a compromise of the account kdesu accesses. This update also fixes memory leaks in Konqueror (khtml) and KDebug, as well as some minor bugs. kdelibs 2.2alpha1 includes those fixes, as well; if you're using the experimental package from rawhide or ftp.kde.org, you don't need to downgrade to the errata package for security reasons.