in XUL oddness between 1.0 and 1.1

[Phil Messenger]

I've got a simple XUL app which uses the <editor> tag. It functions quite
nicely in Mozilla 1.0 but breaks in Mozilla 1.1. I've stripped it down
completely to the following snippet. In Mozilla 1.0, I can edit the page.
In Mozilla 1.1, I can't. So what's changed and/or what am I doing wrong?

<?xml version="1.0"?>

<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul";
  onload="doInit();"
  id="editorWindow"
  >

  <script type="application/x-javascript"><![CDATA[

    function doInit() {
      netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
      var editorElement = document.getElementById("content-frame");
      editorShell = editorElement.editorShell; 
      editorType = 'html';
      editorShell.editorType = editorType;
      editorShell.webShellWindow = window;
      editorShell.contentWindow = window._content;
      editorShell.LoadUrl("http://www.google.com";);
    }
  ]]></script>

  <vbox id="appcontent" flex="1">
    <deck id="ContentWindowDeck" selectedIndex="0" flex="1">
      <stack>
        <editor type="content-primary" id="content-frame" src="about:blank" 
context="editorContentContext" flex="1"/>
      </stack>
    </deck>
  </vbox>
</window>