KDE released version 4.5 some time ago. However it hasn’t appeared in Fedora 13. There is some suggestion that it will be saved for Fedora 14. Of course this brought the question can it be installed on Fedora 13?
There is a thread on the Fedora Forum that provides the answer. I have used it one computer for a couple of weeks without issue although it has some quirks that suggest it is not the final version. If you want to give it a go have a look at http://forums.fedoraforum.org/showthread.php?t=250066
Techodyssey 