clicking the 'respond' button on plasma notifications for incoming messages does nothing, I always have to click the icon in the systray Reproducible: Always
Same goes for version 0.5.1 on archlinux.
Is this still the case with KDE 4.10? It works for me
*** Bug 318482 has been marked as a duplicate of this bug. ***
Confirming that the problem exists on 4.10.2. Additionally, clicking the 'Respond' button should also make the notification itself go away, instead of letting it linger in the tray.
The staying notification is most probably caused by using "Persistent" flag on it, which was a workaround with old notifications. It should be changed back to "CloseOnActivated" or something. Hopefully the original problem with notifications is fixed now.
*** This bug has been marked as a duplicate of bug 319290 ***