infoShadowAnchor not positioning correctly

Hello,

Sorry if this is a dumb question, but I'm new to this!

I can't get the infoShadowAnchor to position itself correctly.
No matter what coordinates I put in it seems to be locked to the
infoWindow.

If I change the infoWindowAnchor coordinates the info window moves, and
so does the shadow - but altering the shadows coordinates doesn't
change anything.
I'd like to be able to position them independently.

Any ideas??
Here is the code I've been using;

<script type="text/javascript">
//<![CDATA[

if (GBrowserIsCompatible()) {
// this variable will collect the html which will eventually be
placed in the sidebar
var sidebar_html = "";

// arrays to hold copies of the markers and html used by the
sidebar
// because the function closure trick doesnt work there
var gmarkers = [];
var htmls = [];
var i = 0;

// Create our "tiny" marker icon
var icon = new GIcon();
icon.image = "http://www.safeberths.com/yachtg2.gif";
icon.shadow = "http://www.safeberths.com/yachtshadow.png";
icon.iconSize = new GSize(30, 20);
icon.shadowSize = new GSize(30, 20);
icon.iconAnchor = new GPoint(10, 10);
icon.infoShadowAnchor = new GPoint(1,1);
icon.infoWindowAnchor = new GPoint(30, 20);

// A function to create the marker and set up the event window
function createMarker(point,name,html) {
// FF 1.5 fix
html = '<div style="white-space:nowrap;">' + html + '</div>';
var marker = new GMarker(point, icon);
GEvent.addListener(marker, "click", function() {
marker.openInfoWindowHtml(html);
});
// save the info we need to use later for the sidebar
gmarkers[i] = marker;
htmls[i] = html;
// add a line to the sidebar html
sidebar_html += '<a href="javascript:myclick(' + i + ')">' +
name + '</a><br>';
i++;
return marker;
}

// This function picks up the click and opens the corresponding
info window
function myclick(i) {
gmarkers[i].openInfoWindowHtml(htmls[i]);
}

// create the map
var map = new GMap(document.getElementById("map"));
map.addControl(new GLargeMapControl());
map.addControl(new GMapTypeControl());
map.centerAndZoom(new GPoint([[7labr]]), 3);

// Read the data from example.xml
var request = GXmlHttp.create();
request.open("GET", "http://www.safeberths.com/locdat.xml",
true);
request.onreadystatechange = function() {
if (request.readyState == 4) {
var xmlDoc = request.responseXML;
// obtain the array of markers and loop through it
var markers =
xmlDoc.documentElement.getElementsByTagName("marker");

for (var i = 0; i < markers.length; i++) {
// obtain the attribues of each marker
var lat = parseFloat(markers[i].getAttribute("lat"));
var lng = parseFloat(markers[i].getAttribute("lng"));
var point = new GPoint(lng,lat);
var html = markers[i].getAttribute("html");
var label = markers[i].getAttribute("label");
// create the marker
var marker = createMarker(point,label,html);
map.addOverlay(marker);
}
}
}
request.send(null);
}

else {
alert("Sorry, the Google Maps API is not compatible with this
browser");
}

//]]>
</script>