Polish hacker Michal Zalewski has ratcheted up his ongoing assault on Web browser security models, releasing details on serious flaws in fully patched versions of IE 6, IE 7 and Firefox 2.0.

Read the whole story:
http://blogs.zdnet.com/security/?p=254

See one of the IE security holes:
http://lcamtuf.coredump.cx/ierace/

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