Well, it really seems to be random.

Is there straight forward method to find all the apps which are additional to the defaults?

I don't have to kill anything. I just have to wait a while (Minutes...) and then suddenly everything I clicked pops up. And I have to close each app I desperately clicked on.

The status applet and switching desktops works flawless, even the top left "Multi function button" works, I can go to the applications and start each application from there, but not from the Desktop.

But did anyone experience the other issue, when clicking a button really short, it gets highlighted but not executed.

Cheers
Bjoern