Here's an odd one. Google's counting a single Flickr photograph as if it was a blog.
Google's certainly struggling with Google Alerts and their new way to read blogs - not just looking at the RSS feed but looking at the whole page. The amount of 'weak positives' when names appearing just in blogrolls rather than the new post are down but they're still happening.
This Flickr false blog reading may be due to the RSS Flickr spits out (Google Blogsearch often thinks that anything which produces an RSS feed is a blog...) and that the photo has actually been removed.
There is text behind that link rather than an image after all. Its just not a blog!