suzukik - 2:16 am on Jul 4, 2011 (gmt 0)
I found a SEO blogger in my country(Japan) who had received a message warning against unnatural links including paid links via Google Webmaster Tools as below:
Google Webmaster Tools notice of detected unnatural links to URL
we've detected that some of your site's pages may be using techniques that are outside google webmaster guidelines.
specifically,look for possibly artificial or unnatural links pointing
to your site that could be intended to manipulate PageRank. Examples
of unnatural linking could include buying links to pass PageRank or
participating in link schemes.
we encourage you to make changes to your site so that it meets our
once you've made these changes,please submit your site for
reconsideration in google's search results.
if you find unnatural links to your site that you are unable to
control or remove,please provide the details in your reconsideration
if you have any questions about how to resolve this issue,please see
our webmaster help forum for support.
google search quality team
We know WMT warns against unnatural links on your site pointing to other sites:
New Alert? "Webmaster Tools notice of detected unnatural links." [webmasterworld.com]
Unnatural Links message [google.com]
But this time it warns against those on other site pointing to your sites. It must be new and mean they can detect sites buying links from other sites.