Hi: I came across this recently and suspect it might be a Fedora package
special. It works OK if I disable Notifications, and might well do so
once they have been properly associated. K3b ought to check this, though.
I'm running Fedora 14. I don't recollect touching the K3b Notifications
settings, but I haven't heard the trumpets recently.
https://bugs.kde.org/show_bug.cgi?id=284966
John P