Accessibility : Broken Skip Link Error on "Skeleton" Theme
I use the Skeleton theme. it has:

  &lt;div id="skip-link"&gt;
    &lt;a href="#main-content" class="element-invisible element-focusable"&gt;Skip to main content&lt;/a&gt;
  &lt;/div&gt;


But it has no anchor tag for main-content. You should file an issue for the Project on Drupal.org.

You can fix this by supplying a patch to the theme project that alters html.tpl.php or page.tpl.php to include an &lt;a name="main-content"&gt;&lt;/a&gt; at the top of the content area. You may do this in your own subtheme as well of course simply by modifying the necessary TPL file.

EDIT:
Issue created at Drupal.org https://drupal.org/node/2211661