Switching on my xubuntubox (or should it be Oubuntu?) for the first time since last night gave me a nasty surprise. All the customizations are gone!
Right away I checked for my .xsession file. It was there, with all the adjustments I made: feh (for background), gdesklets (for desktop toys) and xfce-xcm-manager (for xfce goodness). Why didn't it run?!
Checking the CustomXsession Wiki, I found the culprit: my #!/usr/bin/env bash line was missing.
*sigh* The joy of tech.