title: 100% width is bigger than parent's div
body: <p>I'm working on vBulletin theme, but on thread list, every thread has 100% for its width but threads are also bigger than their parents, but when i remove border of threads, they will fit parent's div:). so think this problem is on borders. </p>
  
  <p>You can see that better on <a href="http://jsfiddle.net/wKmGu/">jsfiddle</a> (thread is white shape with black border)
  </p>
  
  <pre class="lang-html prettyprint-override"><code>&lt;body&gt;
     &lt;div class="after-body"&gt;
          &lt;div class="body-wrapper"&gt;
               &lt;div class="threadlist"&gt;
                      &lt;ol class="threads"&gt;
                          &lt;li class="threadbit"&gt;&lt;div class="thread"&gt;&lt;/div&gt;&lt;/li&gt;
                          &lt;li class="threadbit"&gt;&lt;div class="thread"&gt;&lt;/div&gt;&lt;/li&gt;
                      &lt;/ol&gt;
               &lt;/div&gt;
          &lt;/div&gt;
     &lt;/div&gt;
  &lt;/body&gt;
  </code></pre>