// We need an array of all board permissions.
        if (!empty($context['new_topic']['possible_perms']))
        {
            $current_perms = explode(',', $context['new_topic']['possible_perms']);
            $new_perms = explode(',', $row['member_groups']);
            $updated_perms = array_diff($new_perms, $current_perms);
            if ($updated_perms == $current_perms)
                $final = array_merge($updated_perms, $context['new_topic']['possible_perms']);
            else
                $final = $current_perms;
            $context['new_topic']['final_perms'] = $final;
            unset($context['new_topic']['possible_perms']);
        }
        else
        {
            $context['new_topic']['possible_perms'] = $row['member_groups'];
        }