Don,
Sorry it has taken so long to get back to you. Attached is sample that shows the problem. If you browse test@.aspx with Firefox and right click you will see a context menu. Clicking on the first option in the menu will display the marker at the point of the click.
If you browse with Chrome and do the same thing the marker is not displayed.
Line 790 of Marker.js is
var feature = new OpenLayers.Feature(markers, new OpenLayers.LonLat(mouseRightClickLocation.lon, mouseRightClickLocation.lat));
This call fails in Chrome becase the returned lat, lon are null.
Since Chrome is an up and coming browser we need this function.
Can you come up with an alternative for us?
Thanks,
Al Vigil
p.s. the zipped project is over two MB, so I cannot attach here. Can you tell me how to send to you? In the meantime I am going to to support@thingeo.com