rem: prefs.setComplexValue(aPrefName, Components.interfaces.nsISupportsWString, str); 
add: prefs.setComplexValue(aPrefName, Components.interfaces.nsISupportsString, str); 
context: function SetUnicharPref(aPrefName, aPrefValue){  var prefs = GetPrefs();  if (prefs)  {    try {      var str = Components.classes["@mozilla.org/supports-wstring;1"]                          .createInstance(Components.interfaces.nsISupportsWString);      str.data = aPrefValue;      prefs.setComplexValue(aPrefName, Components.interfaces.nsISupportsWString, str);    }    catch(e) {}  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/3703f3c61bce0c45d03ff380dc6b806f944ecb73/editorUtilities.js/buggy/editor/ui/composer/content/editorUtilities.js