Google confirmed a bug with the link report tool within Google Webmaster Tools.
In a Google Webmaster Help thread, Googler Asaph Zemach confirmed an issue with links being reported to specific web sites were inflated and wrong.
Asaph said in response to some complaints:
What I found pretty interesting outside of the issue with the report and it coming a day after I published the poll results saying 68% feel Google Webmaster Tools isn’t accurate is that the site in question here was just published in a big story in the Wall Street Journal.
The Wall Street Journal article is named Sites Retool for Google Effect and covers one web site, this onewayfurniture.com site, that took a big hit. And Googlers are responding to onewayfurniture.com’s questions in Google Webmaster Help forums.
Anyway, I am not sure how wide spread the bug was with the Google link report tool, but I wanted to make sure you all knew about it.
Forum discussion at Google Webmaster Help.