rem: dlmgr.open(window); 
add: dlmgr.open(window, null); 
context: function toDownloadManager(){  var dlmgr = Components.classes['@mozilla.org/download-manager;1'].getService();  dlmgr = dlmgr.QueryInterface(Components.interfaces.nsIDownloadManager);  var windowMediator = Components.classes['@mozilla.org/appshell/window-mediator;1'].getService();  windowMediator = windowMediator.QueryInterface(nsIWindowMediator);  var dlmgrWindow = windowMediator.getMostRecentWindow("Download:Manager");  if (dlmgrWindow) {    dlmgrWindow.focus();  }  else {    dlmgr.open(window);  }}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/79f7f666872d4b56721b0f73208235681fd7318b/tasksOverlay.js/buggy/suite/common/tasksOverlay.js