Mouse events propagation from marker to underlying map - google-maps-api-3

Question

I have one question,
why dose mouse events related to a map never fire when we are over marker
exp. having a mouse move listener added to a map is never called when we move over a marker
(there is not so called event propagation or bubbling).
This was actully working on maps v2!
Is it a bug, or its changed to this behavior in v3?
Blaze
Here is the example...
If you move around the map, the mapLabel is updated as should be
but if u move over the marker the mapLabel is never updated
var map;
function initialize() {
var myLatlng = new google.maps.LatLng(-25.363882,131.044922);
var myOptions = {
zoom: 4,
center: myLatlng,
mapTypeId: google.maps.MapTypeId.ROADMAP
}
map = new google.maps.Map(document.getElementById("map_canvas"), myOptions);
google.maps.event.addListener(map, 'MOUSEMOVE', function() {
document.getElementByID('moveLabel').innerHtml = 'Mouse map move' + Math.random();
});
var marker = new google.maps.Marker({
position: myLatlng,
map: map,
title:"Hello World!"
});
google.maps.event.addListener(marker, 'MOUSEOUT', function() {
document.getElementByID('markerLabel').innerHtml = '';
});
google.maps.event.addListener(marker, 'MOUSEOVER', function() {
document.getElementByID('markerLabel').innerHtml = 'Mouse over marker';
});
}

Answer 1

All google maps' data that is drawn placed on 7 layers. These layers are called Panes. According to what pane the drawing belongs , it can receive or not receive events. For more information look at the google.maps.MapPanes documentation.
UPDATE: Google maps draws all data on 7 panes. All panes are children of the same parent. For event bubbling it is neccessary that the relation of elements should be parent-child ( then child can bubble the event to parent ),but not sibling-sibling. In sibling-sibling relation, event is received by element with the highest z-index. This is the reason you don't get events bubbled from marker's pane to map's pane.