rem: if( this._window ) { this._window.replace(isValidString(propValue) ? propValue : "about:blank"); 
add: if(this._window && !this._window.closed) { this._window.location.replace(isValidString(propValue) ? propValue : "javascript:/" + "/"); 
context: proto._modifySource = function(propValue, propOldValue, propName, uniqModIds) {  if( this._window )  {    this._window.replace(isValidString(propValue) ? propValue : "about:blank");  };  return true;};
meta: 1005	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/1005/0777e57a0852756f61d2e445316586f6b92ba454/QxNativeWindow.js/buggy/qooxdoo/source/script/core/QxNativeWindow.js