add:  top.controllers.appendController(DefaultController);  
context: function SetupCommandUpdateHandlers(){	dump("SetupCommandUpdateHandlers\n");	var widget;		// folder pane	widget = GetFolderTree();	if ( widget )		widget.controllers.appendController(FolderPaneController);		// thread pane	widget = GetThreadTree();	if ( widget )		widget.controllers.appendController(ThreadPaneController);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/bd6b1c478ea9b7e79006534e782904dd63ca6be4/widgetglue.js/buggy/mailnews/base/resources/content/widgetglue.js