rem: if (children.length > 0) { 
add: if (children.length > 0 && children[0].firstChild) { 
context: GeoMashup.getTagContent = function (parent, tag, default_value) {	if (!default_value) {		default_value = '';	}	var children = parent.getElementsByTagName(tag);	if (children.length > 0) {		return children[0].firstChild.nodeValue;	} else {		return default_value;	}}
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