I can confirm, that this is caused by muon-notifier service.
After renaming /usr/share/kde4/services/kded/muon-notifier.desktop file and restarting kdeinit4 everything works fine and above two bugs are not reproducible.
$ dpkg -l | grep muon-notifier
ii muon-notifier 1.3.1-0ubuntu2 update notifier for KDE
I can confirm, that this is caused by muon-notifier service. kde4/services/ kded/muon- notifier. desktop file and restarting kdeinit4 everything works fine and above two bugs are not reproducible.
After renaming /usr/share/
$ dpkg -l | grep muon-notifier
ii muon-notifier 1.3.1-0ubuntu2 update notifier for KDE