Action Menus being hidden

I have installed Drupal core 7.22 with Drupal commons and my action menus do not appear.

i.e. on mysite.com/admin/people page, the "Add User" button is not visible. When the page draws, you can see it for a moment before it is hidden.

As I inspect the elements, I find the button nicely wrapped in

    <nav class="actions-wrapper menu-wrapper clearfix">
        <ul class="action-links clearfix">
            <li><a href="/admin/people/create">Add user</a></li>
        </ul>
     </nav>

The matched CSS rule has

.keeper-container kwform, .keeper-container form, .menu-wrapper, .security-question-wrapper {
display: none;
}

which explains it not showing.

My question is Why? This is using an administrator account with all permission set.

Thought as to which switch I am missing?

Thanks