I've installed the Robots Meta plugin v3.0.11 and Digg This O' Mine v1.0.2. They do not work together. Digg This O' Mine breaks and the setting panel does not display properly in the Dashboard.
Disabling Robots Meta plugin, restores the Digg This O'Mine settings panel.
One is conflicting with the other, but I don't know which is the culprit.