MarkerClusterer - markers disappearing after crossing the "globe border"

[GoogleCodeExporter]

What steps will reproduce the problem?
http://gmaps-utility-library-
dev.googlecode.com/svn/tags/markerclusterer/1.0/examples/advanced_example.h
tml

2. Press [-] in the zoom several times until the limit.
3. Press [+] in the zoom 4 times in the USA area.
4. Pan the map (use the mouse to drag the map) in the europe direction, 
continue panning until reaching the america area again. Sometimes the 
clusters/markers disappear. If you they don't disappear, continue panning 
and they will disappear.

What is the expected output? What do you see instead?
Markers not disappearing

What version of the product are you using? On what operating system?
Current demo as of today:
http://gmaps-utility-library-
dev.googlecode.com/svn/tags/markerclusterer/1.0/examples/advanced_example.h
tml

Original issue reported on code.google.com by [email protected] on 15 Apr 2010 at 12:07