Bug in marker clusterer?

[Pil]

Try this example in the demo gallery and choose Marker Clusterer from the cheeckbox at the bottom

http://gmaps-samples-v3.googlecode.com/svn/trunk/toomanymarkers/toomanymarkers.html

Then try to click on some of the clusters to reveal the markers behind.

You'll notice that there are nearly always new clusters appearing behind the clusters - until the highest zoom level is reached. Then nothing happens when you click on one of the clusters. So you will not see any markers. Seems as if the map contains too less zoom levels for the marker clusterer.

[Pil]

Ok, found out where the error is: This page sets maxZoom option of markerclusterer generally to 19 and doesn't care about the map type.