Well, this is almost amusing - not

. Just did an update on my system, rebooted and got this -
No Exec line in the session file;
26 Openbox. Running the GNOME failsafe session instead.
Updates amounted to an 18mb download, and were for Openbox, Thunderbird, htop and some other little thing. Can't remember if I had updated at all during the Spacefm testing, but I do know I always do updates with a sense of uneasiness!
EDIT - gnupg (1.4.11-1pclos2010) to 1.4.12-1pclos2012
htop (0.9-1pclos2010) to 1.0-1pclos2012
mozilla-thunderbird (9.0.1-1pclos2011) to 10.0-1pclos2012
openbox (3.5.0-2pclos2011) to 3.5.0-3pclos2012
Got back in through xterm and disabling GDM auto login. Lost my "desktop" and will have to go fossicking. Everything else seems to work- -keyboard commands etc. Who knows!?!
EXTRA EDIT - Seems that the OB session has changed to "26Openbox", and it had been running "25Openbox" as found in /etc/X11/wmsession.d. Wondering if that is purely due to the OB update, or whether there is a conflict. Either way conky and stalonetray fail to start as listed in the autostart.sh file.