In February we reported on webmasters complaining they were seeing negative link counts in Google Webmaster Tools.
Today, I spotted a thread at Google Webmaster Help showing this actually happening. A picture really proves it.
I am not sure how a site can remove links from a link count, but somehow this report is showing negative link counts from omnique.com, which is cool. Maybe SEOs can learn something from this?
In addition, there is another Google Webmaster Help thread that shows links from domains that do not exist. At least, it shows by IP address, which can happen.
In both cases, Googlers promised to escalate the bug upwards to be fixed.