private function load()
    {
        // Load default settings
        if (!$this->load_from_file('defaults.inc.php')) {
            $this->errors[] = 'defaults.inc.php was not found.';
        }

        // load main config file
        if (!$this->load_from_file('config.inc.php')) {
            // Old configuration files
            if (!$this->load_from_file('main.inc.php') || !$this->load_from_file('db.inc.php')) {
                $this->errors[] = 'config.inc.php was not found.';
            }
            else if (rand(1,100) == 10) {  // log warning on every 100th request (average)
                trigger_error("config.inc.php was not found. Please migrate your config by running bin/update.sh", E_USER_WARNING);
            }
        }

        // load host-specific configuration
        $this->load_host_config();

        // set skin (with fallback to old 'skin_path' property)
        if (empty($this->prop['skin'])) {
            if (!empty($this->prop['skin_path'])) {
                $this->prop['skin'] = str_replace('skins/', '', unslashify($this->prop['skin_path']));
            }
            else {
                $this->prop['skin'] = self::DEFAULT_SKIN;
            }
        }

        // larry is the new default skin :-)
        if ($this->prop['skin'] == 'default') {
            $this->prop['skin'] = self::DEFAULT_SKIN;
        }

        // fix paths
        foreach (array('log_dir' => 'logs', 'temp_dir' => 'temp') as $key => $dir) {
            foreach (array($this->prop[$key], '../' . $this->prop[$key], RCUBE_INSTALL_PATH . $dir) as $path) {
                if ($path && ($realpath = realpath(unslashify($path)))) {
                    $this->prop[$key] = $realpath;
                    break;
                }
            }
        }

        // fix default imap folders encoding
        foreach (array('drafts_mbox', 'junk_mbox', 'sent_mbox', 'trash_mbox') as $folder) {
            $this->prop[$folder] = rcube_charset::convert($this->prop[$folder], RCUBE_CHARSET, 'UTF7-IMAP');
        }

        // set PHP error logging according to config
        if ($this->prop['debug_level'] & 1) {
            ini_set('log_errors', 1);

            if ($this->prop['log_driver'] == 'syslog') {
                ini_set('error_log', 'syslog');
            }
            else {
                ini_set('error_log', $this->prop['log_dir'].'/errors');
            }
        }

        // enable display_errors in 'show' level, but not for ajax requests
        ini_set('display_errors', intval(empty($_REQUEST['_remote']) && ($this->prop['debug_level'] & 4)));

        // remove deprecated properties
        unset($this->prop['dst_active']);

        // export config data
        $GLOBALS['CONFIG'] = &$this->prop;
    }