Got this from another one of the Yahoo groups:

Think this is very important for us Yahoo Group Users:

"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.html About
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."