>Today, when I logged into MSN Messenger, I got a messages asking me whether I want to upgrade to the latest version. I clicked on "no" (option group), followed by the "OK" button, and the login simply aborted. I tried it several times, and it happened over and over again. I could simply not login, until I agreed to download the latest and greatest version!
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>(MSN Messenger is an instant messaging program, distributed for free by Microsoft.)

I think MSN is changing their protocol to a proprietary format. That would require a new version of the messenger. That's what I have heard at least.