A third and final release candidate is available now for the upcoming KDE SC 4.5. Target for the final release of KDE 4.5 is still august, 2010.
This time, the packages which I created are for Slackware-current only (32-bit as well as 64-bit). The packages are available in my ktown repository. Slackware 13.1 users who want to move to KDE 4.5 should take this opportunity to upgrade to Slackware-current now. If you want to stick with Slackware 13.1 but still want the latest stable KDE then your best shot will be my version of KDE 4.4.5 packages and dependencies that are good for Slackware 13.1 (I will keep those around for quite a while).
With regard to my new set of KDE 4.5-rc3 packages: there is one dependency which is not yet part of Slackware (libdbusmenu-qt) and a single dependency which got updated (soprano) but other than that, Slackware-current is fully up-to-date for KDE 4.5. You will find the libdbusmenu-qt and updated soprano packages in the “deps” directory.
The 4.5-rc3 packages are accompanied by a README which explains the straight-forward installation/upgrade steps.
This will be your last chance to influence the quality and stability of this new KDE. Go and find bugs… and get them fixed by reporting them on http://bugs.kde.org/ .