rem: this.prefBranch.clearUserPref(prefName); 
add: try { this.prefBranch.clearUserPref(prefName); } catch(ex) {  } this.delayedSave(); 
context: function pm_reset(prefName){    this.prefRecords[prefName].realValue = null;    this.prefBranch.clearUserPref(prefName);}
meta: 3298	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/3298/5b072905fe05cda9766df29e689512174dbf879d/pref-manager.js/clean/js/lib/pref-manager.js