Admin password not accepted in Parental Controls 10.8.2

When logged in to my kids accounts I am trying to make changes to System Prefs and open allowed apps. (those I have ticked as allowed in Parental Control prefs) and the admin name and password is rejected and I get the 'wobble box'! Arghhh!!!!!!!

The same admin. name and master password are accepted when logging in to my main account and everywhere else...just not in parental controls. None of the ticked allowed items can be opened by parental controlled accounts.

Makes the parental controls totally unusable.

Bug! Bug! Bug!