Posted by TheodorosPloumis on December 14, 2010 at 8:26pm
There is a 'skip to main content' relative link at line 28 of maintance-page.tpl.php (and also on page.tpl.php)
<a href="#main-content"><?php print t('Skip to main content'); ?></a>
This leads to the specific div (main-content) on the rendered html file.
But in Drupal 7 the user Admin can position the main content block in another place (for example at Header region) so the link does not skip to the main content...