> I noticed that Yahoo has some kind of redirect on its search results
> pages. When you click on the search results you are not taken directly by
> a regular
> <a href="..."> link. Is this new, because I don't remember it before?
You should read this...
It contains the gist of things, but points to the following hugely-popular
essay by an ex-Microsoft Project Manager:
What you describe can be a form of spying using cookie domain exchange.
Roy S. Schestowitz