The popups go away, then cause:
[Exception... "Node was not found" code: "8" nsresult: "0x80530008 (NS_ERROR_DOM_NOT_FOUND_ERR)" location: "/lib/OpenLayers.js Line: 7663"]
This will hopefully silence the exception.
git-svn-id: http://svn.openlayers.org/trunk/openlayers@1499 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf