>Several courts in the US have ruled that while you can say "terms may change", you have
>to notify people of the changes. It isn't enough to post them on your website. With shink
>wrapped software, the publisher doesn't always know who the user is. Microsoft is a
>good example.


That's why certain security patches and software revisions physically provide the "Accept" and "Decline" buttons you must accept to use the new version of the software under the new license. People agree by clicking "Accept" or "I Agree".