So hover over one of your, let's say Yahoo, results (natural) and you see the lovely redirect (rds.yahoo.com/abunchofnumbers...) where you are taken to before you get to the actual URL that is ranking.

Has anyone heard of losing referal data as a result of this redirect when checking your site traffic? Meaing it looks like it's coming from Yahoo but you just can't data for the keyword that was used in the query to get the aforementioned result.