i can confirm this bug on gutsy gibbon
runnining update-menu and copying fluxbox-menu to menu in ~/.fluxbox was solving the problem (cp ~/.fluxbox/fluxbox-menu ~/.fluxbox/menu)
(thanks Davide R!)
i can confirm this bug on gutsy gibbon
runnining update-menu fluxbox- menu ~/.fluxbox/menu)
and copying fluxbox-menu to menu in ~/.fluxbox was solving the problem
(cp ~/.fluxbox/
(thanks Davide R!)