Also works in ColdFusion
I had the same problem in the map when used with Coldfusion. Removing the icon_0.infoWindowAnchor line from the wagmp_map_1.cfm file got rid of the popup.
I know it's not that relevant to this discussion, but I've been looking for this solution for a while and the search engines keep pointing to this discussion. So I thought I'd put the Coldfusion solution here.