rem: this.update.QueryInterface(Components.interfaces.nsIWritablePropertyBag); 
add: if (this.update) this.update.QueryInterface(Components.interfaces.nsIWritablePropertyBag); 
context:   setUpdate: function(update) {    this.update = update;    this.update.QueryInterface(Components.interfaces.nsIWritablePropertyBag);  },
meta: 8395	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/8395/c2866a39aa5607e501d7cd627f940c2359c4d480/updates.js/clean/toolkit/mozapps/update/content/updates.js