The following was taken from one of the forums . Based on this, I have changed my Explorer browsers. Read the following and then decide for yourself what action you want to take.
If you belong to ANY Yahoo! Groups - be aware that Yahoo! is now using "Web Beacons" to track every Yahoo! Group user. They're similar to cookies, but allow Yahoo! to record every Web site and every group you visit, even when you're not connected to Yahoo!.
Look at its updated privacy statement here.
http://privacy.yahoo.com/privacy/us/beacons/details.htmlOn that page midway down you will find a section entitled "Outside the
Yahoo! Network." In that section find a little "Click Here to Opt Out"
link that will let you "opt-out" of its snooping. Be careful NOT to
click on the next button shown. It is an "Opt Back In" button that, if
clicked, will UNDO the opt-out.
Note that Yahoo!'s invasion of your privacy - and your ability to
opt-out of it - is not user-specific. It is MACHINE specific. That
means you will have to opt-out on every computer (and browser) you use.
PJ
Victoria, BC Canada