Comment 67 for bug 138691

I am not sure what KDE version you are all using and I don't think this has been discussed here yet. Anyway, for me, the problem appeared when switching to KDE 4. However, since recently I am using KDE 4.1 Beta (installation instructions from http://www.kubuntu.org/announcements/kde-4.1beta1.php) and the problem does not appear as often as it used to anymore. You might want to give it a try, it's actually pretty stable already.