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
Rory
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.