Comment 62 for bug 79289

Problem found!

Thanks to a few persons who helped: Rimas and Wilco (hallo daar!)

You helped me find the culprit. I was initially going to ask on for a pstree of someone also running KDE, but then it struck me: I use alltray with thunderbird to keep it in the system tray ('docked'). This is so natural for me - I didn't quite remember that this wasn't a feature of thunderbird itself (why isn't it, anyways :))
So the tree became

kdeinit-+-alltray
        |-artsd
        |-compiz.real
...
        |-python
        `-smart-notifier
thunderbird---run-mozilla.sh---thunderbird-bin---6*[{thunderbird-bin}]

Instead of

kdeinit-+-artsd
...
        |-smart-notifier
        `-thunderbird---run-mozilla.sh---thunderbird-bin---8*[{thunderbird-bin}]

Note how thunderbird is not a (grand)child process of kdeinit when using alltray. I imagine this wreaks havoc on the IPC (security?). Anywyas, I can live with using thunderbird without alltray when reorganizing my mailbox. Also, I'll see whether options/alternatives exist to make thunderbird run in the system tray. I imagine both KDE and thunderbird are prone to have this feature natively by now.

Thanks and I hope someone else is helped with this information.

Regard,
Seth