rem: var category = !aNode.id ? "NC:SearchEngineRoot" : "NC:SearchCategory?category=" + aNode.getAttribute("id"); 
add: var category = !aNode.id ? "NC:SearchEngineRoot" : "NC:SearchCategory?category=" + aNode.getAttribute("id"); 
context: function chooseCategory( aNode ){  var category = !aNode.id ? "NC:SearchEngineRoot" :                   "NC:SearchCategory?category=" + aNode.getAttribute("id");  nsPreferences.setUnicharPref("browser.search.last_search_category", category);  var treeNode = document.getElementById("searchengines");  treeNode.setAttribute("ref", category);  loadEngines(category);  return(true);}
meta: 9421	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/9421/c837d8cd69e2d1c5d2619fe01ec4c3979b2e5f7e/search-panel.js/buggy/suite/common/search/search-panel.js