After nearly 2hrs on this, I found the solution, here: http://ubuntuforums.org/showthread.php?t=2230149
"Just delete the entry iGtk/ColorScheme= from ~/.config/lxsession/Lubuntu/desktop.conf, and then your settings will be saved"
After nearly 2hrs on this, I found the solution, here: http:// ubuntuforums. org/showthread. php?t=2230149
"Just delete the entry iGtk/ColorScheme= from ~/.config/ lxsession/ Lubuntu/ desktop. conf, and then your settings will be saved"