Microsoft’s Internet Explorer 6, 7, and 8 beta 1 appear to contain a security flaw. The flaw could allow users who visit a malicious Web site or open a malicious e-mail message to arbitrary code. U.S. CERT has published a vulnerability note indicating Internet Explorer doesn’t handle document frames securely. Security firm Secunia says other versions of IE may also be affected. Microsoft says it is investigating reports of a possible vulnerability in IE and is unaware of any attacks trying to use the flaw.”]