Today there were 5 flaws for Firefox and IE6/7 unveiled - 2 for IE and 3 for Firefox.
Michal Zalewski disclosed 3 at http://seclists.org/fulldisclosure/2007/Jun/0026.html and the other can be found at http://larholm.com/2007/06/04/unpatched-input-validation-flaw-in-firefox-2004/.