rem: gFolderDatasource = Components.classes[folderDSProgID].createInstance(Components.interfaces.nsIRDFDataSource); 
add: gFolderDatasource = Components.classes[folderDSContractID].createInstance(Components.interfaces.nsIRDFDataSource); 
context: function GetFolderDatasource(){    if (!gFolderDatasource)        gFolderDatasource = Components.classes[folderDSProgID].createInstance(Components.interfaces.nsIRDFDataSource);    return gFolderDatasource;}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/0257791053c2b38e1dfaf2ee11afae973e82e394/SearchDialog.js/buggy/mailnews/base/search/resources/content/SearchDialog.js