Not with ebay, but those URLs are generated by software on the client when a page cannot be found when using certain applications: http://www.winpatrol.com/db/com/bae.html?bae These URLs mean nothing in of themselves, you can just put anything in there to generate the error. http://www.google.com/hws/gateway/afe?hl=en&s=http://msfn.org/The first link posted goes to a tracking image. The second link seems to load a blank page.