I'm running all components from git master, all menus stopped working with the round of updates of this weekend. They both say that they can't find "menus/applications.menu". I have xfce-applications.menu and a gnome-applications.menu in /etc/xdg/menus/ which used to work fine. Do you need any additional information?
Did you update xfce-utils and restart your session? With the latest release of xfce-utils xinitrc exports a variable called XDG_MENU_PREFIX="xfce-" which is required to load menus/xfce-applications.menu by default instead of menus/applications.menu.
Oh, and if you install garcon into a non-standard location (such as /usr/local), you'll have to add export XDG_CONFIG_DIRS=/usr/local/etc/xdg:$XDG_CONFIG_DIRS to your ~/.bash{rc,_profile} because XDG_CONFIG_DIRS usually only includes /etc/xdg or nothing (in which case it falls back to /etc/xdg).
I had not restarted my session :( Thanks for the quickest fix ever ;)