Maybe try Safari on both machines with the Chevrolet test? In my 10.5.1 OS and Safari 3.0.4 typing in chevrolet and hitting return brings up the chevy web site: http://www.chevrolet.com/ Same for Firefox 2.0.0.6 on the same machine. (iMac G5) And I had never been to that site on either browser prior to the test. So I doubt it is a Leopard issue. But much of the conversation about DNS details is beyond me. S