Description of my issue:
I tried to update to Joomla! 3.3.1 but I alwas get the message:
Forbidden
You don't have permission to access /administrator/index.php on this server.
The URL is: http://www.planesharing.at/administrator/index.php?option=com_akeeba&view=backup&autostart=1&returnurl=http%3A%2F%2Fwww.planesharing.at%2Fadministrator%2Findex.php%3Foption%3Dcom_joomlaupdate%26task%3Dupdate.install%26is_backed_up%3D1&profileid=1&176889de3501055ed618ffa136a81a7a=1