This is not a bug in gksu, at least not as of Lucid. It is a bug in sudo. Downgrading sudo to the version in the Karmic-Updates repository fixes this problem. However downgrading the gksu package does not fix it, indicating the issue is with the sudo package alone.
This is not a bug in gksu, at least not as of Lucid. It is a bug in sudo. Downgrading sudo to the version in the Karmic-Updates repository fixes this problem. However downgrading the gksu package does not fix it, indicating the issue is with the sudo package alone.