Hi. I'm a new Kubuntu user. I've just come across this as well, using a fresh Kubuntu Edgy install.
After asking on the KDE mailing list, I was pointed to bug no. 135513 in KDE, which is basically this issue and has already been fixed. Please change the status of this bug to confirmed and notify the packagers to look for the solution in: http://bugs.kde.org/show_bug.cgi?id=135513 -- clicking on icon in tray (korgac) does not open korganizer https://launchpad.net/bugs/70594 -- kubuntu-bugs mailing list kubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/kubuntu-bugs