Same problem here. Besides there's another error too:
(xfce4-menu-plugin:16938): libxfcegui4-WARNING **: XfceAppMenuItem: unable to spawn /build/buildd/nmap-5.00/debian/tmp/usr/share/zenmap/su-to-zenmap.sh
Same problem here. Besides there's another error too:
(xfce4- menu-plugin: 16938): libxfcegui4-WARNING **: XfceAppMenuItem: unable to spawn /build/ buildd/ nmap-5. 00/debian/ tmp/usr/ share/zenmap/ su-to-zenmap. sh