Menu block is not being displayed on the front page
This sounds like a bug that I ran into myself and has been brought up here: http://drupal.org/node/1468420 (submenus of a parent menu item that links to the front page (&lt;front&gt;) do not show when viewing the site's front page). At the time of writing the bug has not been fixed, but there are 2 workarounds that might help you out:


Set the menu link with the &lt;front&gt; path to 'show as expanded'.
Do not use &lt;front&gt; as the menu link path, but instead use your actual front page path (same as in 'admin/config/system/site-information').