title: With XHTML strict the border affects the background color
body: <p>Let's say I have the following minimalistic HTML code:</p>
  
  <pre><code>&lt;!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"&gt;
  &lt;html xmlns="http://www.w3.org/1999/xhtml" &gt;
  &lt;body style="background-color:silver; padding:0px; margin:0px;"&gt;
    &lt;div style="background-color:Lime;"&gt;
      &lt;h1&gt;Title&lt;/h1&gt;
    &lt;/div&gt;
  &lt;/body&gt;
  &lt;/html&gt;
  </code></pre>
  
  <p>There's a gap at the top of the page, it seems as if only the H1's background is colored in lime, or as if the H1 is pushing down the parent div tag. However, if I add "border:solid 1px red;" to the div's style the entire div's background is in lime, not just H1's. I tested it with IE8, FF3.5, and Chrome. They all have the same behavior. If I remove the XHTML strict DocType it works as "expected." What am I missing? Thanks.</p>