I just got this email from the 10-second club.
Yahoo is now using something called “Web Beacons” to track Yahoo
Group users around the net and see what you’re doing. It’s similar to
cookies but apparently oh-so-much-more insidious.
Here’s the spot for you to opt out and review their updated privacy
It’s easy to opt-out (just click on the link about half way down), and it won’t adversely affect your account. I urge everyone who values their privacy to do so.