diff --git a/installer/index.php b/installer/index.php
index 7ed5224..f9f8241 100644
--- a/installer/index.php
+++ b/installer/index.php
@@ -43,7 +43,7 @@
 ini_set('display_errors', 1);
 
 define('INSTALL_PATH', realpath(dirname(__FILE__) . '/../').'/');
-define('RCMAIL_CONFIG_DIR', INSTALL_PATH . 'config');
+define('RCMAIL_CONFIG_DIR', '/etc/roundcube');
 define('RCMAIL_CHARSET', 'UTF-8');
 
 $include_path  = INSTALL_PATH . 'program/lib' . PATH_SEPARATOR;
diff --git a/program/include/iniset.php b/program/include/iniset.php
index 10ae11e..f9d3d92 100755
--- a/program/include/iniset.php
+++ b/program/include/iniset.php
@@ -47,7 +47,7 @@ if (!defined('INSTALL_PATH')) {
 }
 
 if (!defined('RCMAIL_CONFIG_DIR')) {
-    define('RCMAIL_CONFIG_DIR', INSTALL_PATH . 'config');
+    define('RCMAIL_CONFIG_DIR', '/etc/roundcube');
 }
 
 // make sure path_separator is defined
diff --git a/program/include/main.inc b/program/include/main.inc
index 30d9099..8400395 100644
--- a/program/include/main.inc
+++ b/program/include/main.inc
@@ -2101,7 +2101,7 @@ function write_log($name, $line)
 
     // log_driver == 'file' is assumed here
     if (empty($CONFIG['log_dir']))
-      $CONFIG['log_dir'] = INSTALL_PATH.'logs';
+      $CONFIG['log_dir'] = '/var/log/roundcube';
 
     // try to open specific log file for writing
     $logfile = $CONFIG['log_dir'].'/'.$name;
diff --git a/program/include/rcube_config.php b/program/include/rcube_config.php
index 7d46df0..d9990c4 100644
--- a/program/include/rcube_config.php
+++ b/program/include/rcube_config.php
@@ -66,7 +66,7 @@ class rcube_config
 
         // fix paths
         $this->prop['log_dir'] = $this->prop['log_dir'] ? realpath(unslashify($this->prop['log_dir'])) : INSTALL_PATH . 'logs';
-        $this->prop['temp_dir'] = $this->prop['temp_dir'] ? realpath(unslashify($this->prop['temp_dir'])) : INSTALL_PATH . 'temp';
+        $this->prop['temp_dir'] = $this->prop['temp_dir'] ? realpath(unslashify($this->prop['temp_dir'])) : '/tmp';
 
         // fix default imap folders encoding
         foreach (array('drafts_mbox', 'junk_mbox', 'sent_mbox', 'trash_mbox') as $folder)