What's "mouseover functionality"? (was Re: Slow boot, how do I configure for nosity boot?)

[Ralf Mardorf]

I would take a look at e.g.

grep gtk-enable-tooltips ~/.{gtkrc-2.0,config/gtk-3.0/settings.ini}

or

gsettings list-recursively org.mate.panel | grep tool

and so on...