I am getting 1000+ hit from Yahoo Image Search, one single term hitting the same page. This has really skewed my stats. It happened two days in a row on one blog (same page) until I put the post private, I re-published the post later. It also happened on my second blog yesterday.
Several blogs have reported this, even Raincoaster has had this happen to her site – Yahoo changed something and they carpet bomb a site with referrals for an hour or so then go away until the next day
This has happened to a few of our users, and our systems team traced it to an Internet Explorer toolbar called FunWebProducts. When a person using the toolbar visits your page, any image from Yahoo on your page generates a spike in automated visits. It’s not spam or anything malicious on your own computer or your blog. You can safely disregard it, but thanks for letting us know. :)