When I open the xfwm4 settings dialog, xfce-mcs-manager crashes (before displaying the dialog). --enable-debug=yes is on for xfwm4 and libxfce*, though the stacktrace is rather crappy (will attach).
Created attachment 63 backtrace of crash
this might have something to do with the shortcut editor, CCing JF
*** This bug has been marked as a duplicate of 337 ***
*grumble*