diff --git a/installer/config.php b/installer/config.php
index 9d22c28dd..afea04724 100644
--- a/installer/config.php
+++ b/installer/config.php
@@ -202,15 +202,15 @@ $input_dbpass = new textfield(array('name' => '_dbpass', 'size' => 20, 'id' => "
 
 $dsnw = DB::parseDSN($RCI->getprop('db_dsnw'));
 
-echo $select_dbtype->show($_POST['_dbtype'] ? $_POST['_dbtype'] : $dsnw['phptype']);
+echo $select_dbtype->show($RCI->is_post ? $_POST['_dbtype'] : $dsnw['phptype']);
 echo '<label for="cfgdbtype">Database type</label><br />';
-echo $input_dbhost->show($_POST['_dbhost'] ? $_POST['_dbhost'] : $dsnw['hostspec']);
+echo $input_dbhost->show($RCI->is_post ? $_POST['_dbhost'] : $dsnw['hostspec']);
 echo '<label for="cfgdbhost">Database server</label><br />';
-echo $input_dbname->show($_POST['_dbname'] ? $_POST['_dbname'] : $dsnw['database']);
+echo $input_dbname->show($RCI->is_post ? $_POST['_dbname'] : $dsnw['database']);
 echo '<label for="cfgdbname">Database name</label><br />';
-echo $input_dbuser->show($_POST['_dbuser'] ? $_POST['_dbuser'] : $dsnw['username']);
+echo $input_dbuser->show($RCI->is_post ? $_POST['_dbuser'] : $dsnw['username']);
 echo '<label for="cfgdbuser">Database user name (needs write permissions)</label><br />';
-echo $input_dbpass->show($_POST['_dbpass'] ? $_POST['_dbpass'] : $dsnw['password']);
+echo $input_dbpass->show($RCI->is_post ? $_POST['_dbpass'] : $dsnw['password']);
 echo '<label for="cfgdbpass">Database password</label><br />';
 
 ?>
diff --git a/installer/rcube_install.php b/installer/rcube_install.php
index 35054a19e..efe139d7d 100644
--- a/installer/rcube_install.php
+++ b/installer/rcube_install.php
@@ -24,6 +24,7 @@
 class rcube_install
 {
   var $step;
+  var $is_post = false;
   var $failures = 0;
   var $config = array();
   var $configured = false;
@@ -37,6 +38,7 @@ class rcube_install
   function rcube_install()
   {
     $this->step = intval($_REQUEST['_step']);
+    $this->is_post = $_SERVER['REQUEST_METHOD'] == 'POST';
   }
   
   /**
@@ -98,8 +100,7 @@ class rcube_install
    */
   function getprop($name, $default = '')
   {
-    $value = $_SERVER['REQUEST_METHOD'] == 'POST' &&
-              (isset($_POST["_$name"]) || $this->config_props[$name]) ? $_POST["_$name"] : $this->config[$name];
+    $value = $this->is_post && (isset($_POST["_$name"]) || $this->config_props[$name]) ? $_POST["_$name"] : $this->config[$name];
     
     if ($name == 'des_key' && !isset($_REQUEST["_$name"]))
       $value = self::random_key(24);
@@ -133,7 +134,10 @@ class rcube_install
         $value = $val;
       }
       else if ($prop == 'db_dsnw' && !empty($_POST['_dbtype'])) {
-        $value = sprintf('%s://%s:%s@%s/%s', $_POST['_dbtype'], $_POST['_dbuser'], $_POST['_dbpass'], $_POST['_dbhost'], $_POST['_dbname']);
+        if ($_POST['_dbtype'] == 'sqlite')
+          $value = sprintf('%s://%s?mode=0646', $_POST['_dbtype'], $_POST['_dbname']{0} == '/' ? '/' . $_POST['_dbname'] : $_POST['_dbname']);
+        else
+          $value = sprintf('%s://%s:%s@%s/%s', $_POST['_dbtype'], $_POST['_dbuser'], $_POST['_dbpass'], $_POST['_dbhost'], $_POST['_dbname']);
       }
       else if ($prop == 'smtp_auth_type' && $value == '0') {
         $value = '';