Comment 9 for bug 247393

These are the changed that -0ubuntu3 brought about. (libplasma2 is a binary package of kdebase-workspace)

kdebase-workspace (4:4.0.98-0ubuntu3) intrepid; urgency=low

  * Removed kubuntu_13_hide_klipper.diff:
    - Don't use NoDisplay since that breaks autostart
  * Fixed klipper.install not to install the desktop file

None of these seem to be able to fix the systray rendering, so it seems you're just lucky here. ;)