Fedora (and therefore Korora) has just received the update to KDE 4.10.1. THere are a number of improvements claimed for the new version including better stability.
This has been the improvement that I have noticed the most. I had been having issues with KDE locking up after a short time. THere was no discernible pattern to the lock ups so I had found a solution. To be honest I hadn’t tried too hard. I simply switched back to Xfce which was rock solid as always.
One change I’ve made to KDE is that I added the Daisy plasmoid as a Launcher panel. It is now included with Korora 18 and makes a nice addition. It still needs some development as it is missing some features such as the ability to re-arrange icons but it is a nice addition.
KDE 4.10.1 is a recommended update for KDE users and if my experience is a guide it is worth the update.