goodroi - 9:27 pm on Jul 20, 2012 (gmt 0)

Matt Cutts posted about the latest round of unnatural warnings that were sent out yesterday.
[plus.google.com ]

If you received a message yesterday about unnatural links to your site, don’t panic. In the past, these messages were sent when we took action on a site as a whole. Yesterday, we took another step towards more transparency and began sending messages when we distrust some individual links to a site. While it’s possible for this to indicate potential spammy activity by the site, it can also have innocent reasons...

I would not be surprised if Google further expands the notification process in a few more months. Matt Cutts announcement is a good reason why webmasters should think twice when they are notified and think through their changes before implementing them.