For a number of years I have demonstrated the value of backlinks on SEO by using the Adobe Acrobat example. Yesterday when I typed in "click here" Adobe appeared at number 4, whats going on they have been at number 1 for years? Check it here http://tinyurl.com/22rdjvc
Sandbox, How? This is Adobe's acrobat download page not mine, and it is on page 1 of Google in position 4. 2 reasons I can think of are, less people linking to the page, as most people have acrobat or Google have changed the weighting/value of the backlinks?
Maybe Adobe started using some of those links for some keyword benefit. Its nice to rank for "click here", but whats the use?
The caffeine release of Google search in June has implemented many changes. I don't think any of us really know specifically has changed but it's a pretty safe bet that caffeine is the reason.