You can't set it to ''... Maybe try with : 'value' => 'a:0:{}', amy.rich at tufts.edu a écrit : >nicolas.schmitz> In fact you need to edit the "value" field in >nicolas.schmitz> $_prefs['rules'] : > >I did edit the value field. I wanted to remove them all, so I set it to ''. > > -- Nicolas Schmitz