why upgrade? to hide stuff from your wife?

[acroyear]

Interesting selling point, Micro$oft...

Why You Should Upgrade to Internet Explorer 8 Now | LiveScience:

IE8 also offers a private browsing mode called InPrivate, which Microsoft touts as a way to shop for surprise gifts, but it's commonly referred to as "porn mode." Private browsing automatically conceals sites visited by erasing browsing and search history, cookies, form data and passwords. It also clears the browser cache at the end of each session. Once activated, subsequent users will not stumble across any previous data.

To turn on InPrivate, open a new tab, select "InPrivate" under the Safety dropdown menu, which will open a new browsing window. As long as you stay in this second window, your data will not be stored.