Comment 28 for bug 806606

Stable distributions only make updates between minor releases, not between major releases.
This avoid the introduction of regressions in other places.

Nevertheless, gnome-nettool 3.0.1 was released in January and there is no update in Ubuntu.
You can file a bug for getting that package into 11.10.

However, gnome-nettool 3.0.1 does not include the fix for this particular bug because the
solution implies a change in the UI. Therefore it was included in gnome-nettool 3.1, which is
is a development version of the next gnome 3.2 (not released yet).