"Yahoo is now using something called "Web Beacons" to track Yahoo Group users around the net and see what you're doing- similar to cookies.
Take a look at their updated privacy statement:
http://privacy.yahoo.com/privacy/us/pixels/details.htmlAbout half-way down the page, in the section "Outside the Yahoo! Network", you'll see a little "click here" link that will let you opt-out of their new method of snooping. Once you have clicked that link, you are opted out. Notice the "Success" message at the top of the
next page. Be careful because on that page there is a "Cancel Opt-out" button that,
if clicked, will *undo* the opt-out. Feel free to forward this to other groups."