rem: if (link instanceof Components.interfaces.nsIRDFLiteral) 
add: if (link instanceof Components.interfaces.nsIRDFLiteral && link.Value) 
context: function onselect_loadURI(tree) {  var row = tree.currentIndex;  if (row >= 0) {    var resource = tree.view.getResourceAtIndex(row);    var link = tree.database.GetTarget(resource, NC_LINK, true);    if (link instanceof Components.interfaces.nsIRDFLiteral)      loadURI(link.Value);  }}
meta: 10234	/local1/tlutelli/issta_data/temp/all_js/javascript/2006_temp/2006/10234/685b0bb4cb5c3fb9add747b8c4f05bb40b317a51/help.js/buggy/extensions/help/resources/content/help.js