[Bug 986492]

[Kde-i]

I can confirm this on KDE 4.11.00 (running on x86_64, Arch Linux).

My problem was exactly as described: non-kde applications that used the
system tray were not appearing [in the system tray]

To identify which 'containments' to retain, I added a weather
application on my left screen's panel, and a comic application on my
right screen's panel, then dug in the plasma-dekstop-appletsrc file.

I found several 'containments' in there (1,14,28,29,30), of which 1
contained the weather app, and 30 contained the comic app.

After logging out of KDE, I removed 'containments' 14,28,30 from the
plasma-dekstop-appletsrc, and logged back in.

It is a miracle! All the missing icons are back!

In my zeal, however, I note that I managed to delete the desktop
background settings, but that was easily remedied.

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https://bugs.launchpad.net/bugs/986492

Title:
  when amarok started no icon in SystemTray

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