A few weeks ago, Brian wrote a post explaining how our link counts work. Many people told us they found it really helpful.
One of the examples Brian used was Strumpette, a well-known PR blog. It had garnered lots of links in the past, but according to our measurements, hadn't kept up as well recently.
The good people at Strumpette contacted us, understandably concerned that our post had portrayed them in a negative light. They also told us that we hadn't been processing updates from their blog for a few months, even though they'd complained about it. We looked into this more closely, and it turned out they were quite right.
Strictly speaking, the absence of Strumpette's posts in our index don't affect the link count calculation. However, because bloggers in the PR industry frequently use Technorati to track conversation, it's likely that the omissions reduced awareness of Strumpette's posts, and therefore that fewer people would link to them as a result. This is a valid argument, and as I told the Strumpette folks personally, we're really sorry for any harm we may have caused.
Fortunately, Kevin's fixed the spider issue that was causing the problem. We thought other bloggers would find his explanation useful, so he's posted it separately.
