Hack this file: In modules/mod_mainmenu/helper.php on row 330, replace:

<?php
...
$tmp->url = JURI::base();
...
?>

to

<?php
...
$tmp->url = str_replace(array($tmp->route.'/', $tmp->route), '', JRoute::_( $tmp->url ));
...
?>

Dissapearing Menu problem and Home button FIXED !

But ther are still some few annoying bugs Like for example) Home button name appears as page title, on translated page.