Yahoo is Now Tracking Users with Web beacons

Yahoo is now tracking users with new device called Web beacons

http://info.yahoo.com/privacy/us/yahoo/webbeacons/

Yahoo is now using something called Web beacon that users may not be aware of. Web pages may contain an electronic file called a web beacon, that allows a web site to count users who have visited that page or to access certain cookies. Yahoo! uses web beacons in the following ways:
Cleaning your cookies or running cleaner programs will not remove or detect this new tracking device You must opt out on each computer and all browsers on that computer.

If you have a Yahoo e-mail account, toolbar or yahoo messenger you may want to opt out
Here is some information on the subject at the Yahoo site

Below is the direct link.
http://info.yahoo.com/privacy/us/yahoo/opt_out/targeting/details.html

Cheers!