rem: return IO.newURI(IO.newURI(aBase).resolve(aUrl)).spec; 
add:  return IO.newURI(aUrl, null, IO.newURI(aBase)).spec; 
context: function makeURLAbsolute(aBase, aUrl){  return IO.newURI(IO.newURI(aBase).resolve(aUrl)).spec;}
meta: 10520	/local1/tlutelli/issta_data/temp/all_js/javascript/2007_temp/2007/10520/c02f1e3689dd4cfb35b7310d0ef033fb6c1090b3/utilityOverlay.js/buggy/browser/base/content/utilityOverlay.js