'Glcon' is undefined javascript error

Thanks for guidance. No answer yet. Mighty difficult to diagnose these IE Javascript problems. I am wondering whether the problem might relate to other JS. I see drupal.js loads before gmap.js in the page, and the
'GIcon' is undefined
messages are always preceded by the other messages: either
Expected identifier
or
Invalid character

Another theory is it could relate to the Clusterer2.js, but that loads after gmap.js

Looks like I am getting this error sporadically (not frequently) in Firefox 1.5.0.4
In all cases, map fails to display when the error occurs
Changing title

also observing in intyermittently in this browser
IE 6.0.2900.2180.xpsp_sp2_gdr ...

Error: 'Glcon' is undefined
line 81 character 1

Error: 'Glcon' is undefined
line 9 character 3

OK problem recurred in Firefox 1.5.0.4 and I was smart enough to use web developer plugin to diagnose. First JS error is this

Error: Expected ',' or '{' but found '*'.  Ruleset ignored due to bad selector.
Source File: http://localhost/delawarea/modules/gmap/gmap.css
Line: 1

and corresponding code is line 1 of this "gmap.css"

v\:* {
  behavior:url(#default#VML);
}

.gmap-popup{

}

.gmap-tooltip{
   padding: 2px;
   margin: 0;
   border: solid black 1px;
}

2nd error is this

Error: GIcon is not defined
Source File: http://localhost/delawarea/modules/gmap/gmap.js
Line: 8

and corresponding code is line 8 of gmap.js:

  baseIcon['standard'] = new GIcon();

Since all of these "GIcon is undefined" errors were preceded by another error, we can probably pin the blame on the first error. I am unfamiliar with this syntax in CSS:

v\:* {
  behavior:url(#default#VML);
}

Any chance this has an error?

For reference, here is all of gmap.js as seen by the browser

/* $Id: gmap.js,v 1.11 2006/06/17 06:13:22 webgeer Exp $ */

var baseIcon=new Array();
var geocoder = null;
 
function gmap_init() {
  baseIcon['standard'] = new GIcon();
  baseIcon['standard'].image = "http://www.google.com/mapfiles/marker.png";
  baseIcon['standard'].shadow = "http://www.google.com/mapfiles/shadow50.png"
  baseIcon['standard'].iconSize = new GSize(20, 34);
  baseIcon['standard'].shadowSize = new GSize(37, 34);
  baseIcon['standard'].iconAnchor = new GPoint(9, 34);
  baseIcon['standard'].infoWindowAnchor = new GPoint(9, 2);
  baseIcon['standard'].infoShadowAnchor = new GPoint(18, 25);
   
  baseIcon['big']=new GIcon();
  baseIcon['big'].image= gmapMarkerLocation + "/big/blue.png";
  baseIcon['big'].shadow=gmapMarkerLocation + "/big/shadow.png";
  baseIcon['big'].iconsize=new GSize(30,51);
  baseIcon['big'].shadowSize=new GSize(56,51);
  baseIcon['big'].iconAnchor=new GPoint(13,34);
  baseIcon['big'].infoWindowAnchor=new GPoint(13,3);
  baseIcon['big'].infoShadowAnchor=new GPoint(27,37);
   
  baseIcon['small'] = new GIcon();
  baseIcon['small'].image = gmapMarkerLocation + "/small/red.png";
  baseIcon['small'].shadow = gmapMarkerLocation + "/small/shadow.png";
  baseIcon['small'].iconSize = new GSize(12, 20);
  baseIcon['small'].shadowSize = new GSize(22, 20);
  baseIcon['small'].iconAnchor = new GPoint(6, 20);
  baseIcon['small'].infoWindowAnchor = new GPoint(5, 1);
  
  baseIcon['flat'] = new GIcon();
  baseIcon['flat'].image = gmapMarkerLocation + "/flat/x.png";
  baseIcon['flat'].shadow = "";
  baseIcon['flat'].iconSize = new GSize(16, 16);
  baseIcon['flat'].shadowSize = new GSize(0, 0);
  baseIcon['flat'].iconAnchor = new GPoint(8, 8);
  baseIcon['flat'].infoWindowAnchor = new GPoint(8, 8);

}

function createGMarker(point, htmltext, marker, tooltip, towebsite) {
  if (marker.length >0) {
    var re = /markers\/([a-zA-Z0-9]+)\//;
    var m = re.exec(marker);
    var bicon='standard' ;
    if (m) {
      if (baseIcon[m[1]]) {
        var bicon=m[1];
      }
    }
    var markerIcon = new GIcon(baseIcon[bicon]);
    markerIcon.image = marker;
    var returnMarker = new GMarker(point, {icon: markerIcon, title: tooltip});

  }
  else {
    var returnMarker = new GMarker(point, {title: tooltip});
  }
  if (!towebsite) towebsite='';
  // Show this htmltext  info window when it is clicked.
  if (towebsite.length>0 && markerlink){
    GEvent.addListener(returnMarker, 'click', function() {
      open(towebsite,'_self');
    });
  }
  else if (htmltext.length>0) {
    GEvent.addListener(returnMarker, 'click', function() {
      returnMarker.openInfoWindowHtml(htmltext);
    });
  }
  return returnMarker;
}

//moves thispoint based on the form with the id gmap-longitude and gmap-latitude
thispoint=false;

function gmap_textchange(thismap) {
  if (thispoint) {
    thismap.removeOverlay(thispoint);
  }
  thismap.panTo(newpoint=new GLatLng($("gmap-latitude").value, $("gmap-longitude").value));
  thismap.addOverlay(thispoint=new GMarker(newpoint));
}

function gmap_geocodeaddress(thismap, address) {
  geocoder.getLatLng(
    address,
    function(point) {
      if (!point) {
        alert(address + " not found");
      } else {
        if (thispoint) {
          thismap.removeOverlay(thispoint);
        }
        thismap.setCenter(point, 13);
        var thispoint = new GMarker(point);
        thismap.addOverlay(thispoint);

       $("gmap-latitude").value=point.lat();
       $("gmap-longitude").value=point.lng();
      }
    }
  );
  if (thispoint) {
    thismap.removeOverlay(thispoint);
  }
  thismap.panTo(newpoint=new GLatLng($("gmap-latitude").value, $("gmap-longitude").value));
  thismap.addOverlay(thispoint=new GMarker(newpoint));
}

function createMarkerFromRSS(item,icon) {
  var title = item.getElementsByTagName("title")[0].childNodes[0].nodeValue;

//  var description = item.getElementsByTagName("description")[0].childNodes[0].nodeValue;
  var link = item.getElementsByTagName("link")[0].childNodes[0].nodeValue;
//  alert('Link: ' +link);
  // namespaces are handled by spec in moz, not in ie  -- Looking for a better more universal parsing routine.
  if (navigator.userAgent.toLowerCase().indexOf("msie") < 0) {
    // Is there a geo:lat defined?
    if (item.getElementsByTagNameNS("http://www.w3.org/2003/01/geo/wgs84_pos#","lat").length>0) {
      item.getElementsByTagNameNS("http://www.w3.org/2003/01/geo/wgs84_pos#","lat")[0].normalize();
      // Is there a value for geo:lat
      if (item.getElementsByTagNameNS("http://www.w3.org/2003/01/geo/wgs84_pos#","lat")[0].hasChildNodes()) {
        // Then there probably is a geo:long too
        var lat = item.getElementsByTagNameNS("http://www.w3.org/2003/01/geo/wgs84_pos#","lat")[0].childNodes[0].nodeValue;
        var lng = item.getElementsByTagNameNS("http://www.w3.org/2003/01/geo/wgs84_pos#","long")[0].childNodes[0].nodeValue;
      }
    }
  } else {
    var lat = item.getElementsByTagName("geo:lat")[0].childNodes[0].nodeValue;
    if (lat == undefined) {
      lat = item.getElementsByTagName("icbm:lat")[0].childNodes[0].nodeValue;
    }
    var lng = item.getElementsByTagName("geo:long")[0].childNodes[0].nodeValue;
    if (lng == undefined) {
      lng = item.getElementsByTagName("icbm:long")[0].childNodes[0].nodeValue;
    }
  }
  //alert('Lat: '+lat);
  var point = new GLatLng(parseFloat(lat), parseFloat(lng));
  var html = "<a href=\"" + link + "\">" + title + "</a>";
  var marker=createGMarker(point, html, icon, title, link);

return marker;
}

function parseGeoRSS(map, rssurl,icon) {

  var request = GXmlHttp.create();
  request.open("GET", rssurl, true);
  request.onreadystatechange = function() {
    if (request.readyState == 4) {
      var xmlDoc = request.responseXML;
      var items = xmlDoc.documentElement.getElementsByTagName("item");
      for (var i = 0; i < items.length; i++) {

        var marker = createMarkerFromRSS(items[i], icon);
        map.addOverlay(marker);
      }

    }
  }
  request.send(null);
}