grippo - 8:08 pm on Jul 23, 2012 (gmt 0)

The "Unnatural inbound links" can't be so silly as it appears to be. This is how I like to understand:

• Some link building techniques that were working in the past, just won't. They are not talking about well known unnatural links, say black hat. They want to make clear that some link building techniques won't work any more. Forums signatures, links from any friend site where you have enough control to put a link in.
  
• You can't control sh**ty unnatural links. G perfectly knows all about that, and as a matter of fact the original PageRank algo was based on this inability. G are not counting them (I hope). Those are not affecting your rankings (I hope).
  
• There are other kind of unnatural links that Google can't assert if you can or you can't control. Thear are in a gray area. If you made some unnatural linking in the past, you get an alert now, and maybe you can clean some of them. If that happens, G gets a hint. and maybe this is good for your rankings (I hope).
  
• I can't realize what will happen with those unnatural link that stay in the gray area, but I think this notice is for helping to split one from the others.