Comment # 3 on bug 1096374 from Wolfgang Rosenauer

I installed statusnotifier in addition now as recommended.
Still some applications have issues.
Now I cannot easily tell anymore which ones use a "tray" icon or which appear
in the appindicator.

Hexchat, RocketChat, Skype seem to work more or less fine (I think via tray)
while
- SpiderOak does not show an icon but has an active element which can be
controlled (e.g. context menu)
- Zoom does not appear anywhere when autostarted but appears (likely in
statusnotifier) when (re)started afterwards.

Since I have no idea how to debug if it's the application's fault or Xfce's
this is probably a dead end. Anyway I wanted to post my feedback.