rem: _content.defaultCharacterset = getMarkupDocumentViewer().defaultCharacterSet; 
add:     _content.defaultCharacterset = getBrowser().docShell.contentViewer.QueryInterface(Components.interfaces.nsIMarkupDocumentViewer).defaultCharacterSet; 
context: function checkForDirectoryListing(){  if ("HTTPIndex" in _content &&      typeof _content.HTTPIndex == "object" &&      !_content.HTTPIndex.constructor) {    _content.defaultCharacterset = getMarkupDocumentViewer().defaultCharacterSet;    _content.parentWindow = window;  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/bdd8f9230e8f6f117de8a315a613294c9c0f1c2b/navigator.js/clean/xpfe/browser/resources/content/navigator.js