Space between Header and Content Boxes

[Sketchy]

As well, in Firefox... your rounded corners up top are ruined from unused, but active h1 tags in your tagline wrapper. In your custom tpl_header.php, find;

    <div id="taglineWrapper">
      <div id="tagline"><h1></h1></div>
    </div>

Either omit the entire code above or at the very least, omit the h1 open and close tags(in red).