Bug in Debian expertgui installer

[highdruff <highdruff@freenet.de>]

If Debian Etch 4.0r0 installed from the official DVD (i386) with the
bootparameter expertgui
and then deactivate the root Account to use sudo there is a Bug in Gnome
Menue.

Whenever you will start an administrative application with Gnome Menue
there comes an password Dialog and a error Message like
this: Incorrect Password (but it is the right one)
because the entry in Gnome Menue is e.g for start Synaptic gksu -u root
/usr/sbin/synaptic
but the right way is: gksudo -u root /usr/sbin/synaptic.

Then the Application will start correctly and the wrong password Dialog
is away.