In my case, this workaround doesn't do the trick with today's updates. I
can switch permanently to KDE and Xfce, but not permanetly to Gnome.
So, while I can now activate switchdesk for the first time after today's
updates, getting it to stick to a Gnome default continues to be
difficult.
As a temporary solution, would erasing this file knock me back to Gnome
or cause damage?
remove /root/.Xclients
See bugzilla # 121840. Version 4.0.3-1 fixes the basic problem, but
if you have selected KDE and then want to select Gnome from KDE, the
gui already shows Gnome as default, but to make it really change to
Gnome, you need to first select KDE and then select Gnome. It will
then switch to Gnome. The bug report listed above has this
information.