title: Use of custom projection change overlays behavior
body: <p>In the Google Maps example for custom projection in the documentation <a href="http://code.google.com/intl/fr-FR/apis/maps/documentation/javascript/examples/map-projection-simple.html" rel="nofollow">http://code.google.com/intl/fr-FR/apis/maps/documentation/javascript/examples/map-projection-simple.html</a> I noticed different marker behavior depending on the map type used.</p>
  
  <ul>
  <li>With Google map type : when the mouse is over a marker, the city is displayed,</li>
  <li>With custom projection map : when the mouse is over a marker, nothing is displayed.</li>
  </ul>
  
  <p>As I used custom projection, I noticed that this anormal overlays behavior (polygons too) seems related with a problem with custom projection.</p>
  
  <p>Do you confirm that it is a Google Maps API bug ? If yes, is there a workaround ?
  Many thanks !</p>