Running the dev release from last night. In the Security Exceptions Log, when I click on an IP address to add it to the blacklist, it re-loads a blank page and stops. When I go to the blacklist, nothing has been added. Here is the URL of the blank page if that helps any. No other message of any kind shows up.
http://www.***.com/administrator/index.php?option=com_admintools&view=log&task=ban&id=1&cbe16443195939cbfa874d78c4bc64cb=1