nm-applet doesn't set (neither retain) static routes in the IPv4 settings tab

Hello,
Release of Ubuntu:
I'm on Ubuntu Intrepid Ibex 8.10 beta i386 fully updated.

Package:
The binary package is network-manager-gnome 0.7~~svn20081020t000444-0ubuntu1

Expected:
I would like insert a static route trough the 'IPv4 settings tab -> Routes...' of nm-applet's connection edit window, and then seeing that route active on the system.

Instead:
These settings don't have effects. The command 'route -n' doesn't show the inserted route and it doesn't work.
If I re-check, the Routes windows is clean as if I had never inserted anything.

Static route a part, the connection is untouched, so the method is DHCP etc.
Everything else works as expected (default route included).

Thank you, Alessandro