Hi, I have different groups in my wiki. Rollback permission allows one-click reversion of edits. What is this about? What is the usage of this? How can I use this function? I tried to enable/disable this function, but I could not see any changes! I think if I change rollback permission to false -$wgGroupPermissions['Author']['rollback'] = false - , Authors can not view history. Because of this Authors can not undo changes - can not view related changes and after that can not edit and save an older version of the page. (Is it right?) But it is not work in my wiki. How can I disable rollback function? How can I disable rollback tab AND/OR related changes on Authors's pages? Best Regards, Gabor