title: Tooltips not showing when hovering over SVG polygons
body: <p>I have an SVG map of Colorado with polygons for each county.  I'd like the county name to pop up on mouse hover, but that isn't happening.  I have the counties set to change fill on hover, too, and that <strong>is</strong> happening.  I'm not sure what the difference is.</p>
  
  <p>These are just standard browser tooltips, with the intended text set in each polygon's <code>title</code> attribute.</p>
  
  <p>Fiddle here: <a href="http://jsfiddle.net/mmparker/sVbxT/4/" rel="noreferrer">http://jsfiddle.net/mmparker/sVbxT/4/</a></p>