title: (CSS3 flex box) specifying multiple box-lines doesn't work
body: <p>Using flex box, I'm trying to create flexible article nodes that wrap when they fill their parent container (4 or so nodes per row). Currently, they remain on one line and overflow the parent without wrapping. Any ideas?</p>
  
  <p>My css:</p>
  
  <pre><code>.container { 
      display: -webkit-box; 
          height: 100%;
          width: 100%;
          -webkit-box-lines: multiple;   
      -webkit-box-orient: horizontal; }
  
  .container article {
         -webkit-box-flex: 1; } 
  </code></pre>