Comment 4 for bug 934582

Same here, unity session, always happens. Note that as in the previous bug report, this happens when the dconf "/desktop/unity/panel/systray-whitelist" key is set to "all" (which is really the only sane value for it, given that lots of software only supports the gnome systray, and does not support the indicator system).

And I suppose this is an apropos place to once again plead for a "systray-blacklist" key, which would be *far* more useful than systray-whitelist :).