If you have some unsaved documets (for example with gedit), the logout dialog will prompt that to you, but to have more programs to support this, they need to include Gnome Session support.
Unfortunately X doesn't allow us to do a nice fading-out log out, so we can't do it.
We might fade the shell and windows out, but still there will be some garbage on shutdown (as compiz get killed and windows might be shown again).
If you have some unsaved documets (for example with gedit), the logout dialog will prompt that to you, but to have more programs to support this, they need to include Gnome Session support.
Unfortunately X doesn't allow us to do a nice fading-out log out, so we can't do it.
We might fade the shell and windows out, but still there will be some garbage on shutdown (as compiz get killed and windows might be shown again).