Mysite link missing from Web applications in Sharepoint 2010

Issue: Mysite link missing from Web applications in Sharepoint 2010

Cause

Social Tags and Note Board Ribbon Controls" feature de-activated at the farm level

Solution:

 Browse to Central Administration site.
Under “System Settings” section click on “Manage farm Features”
In the “Manage farm Features” look for "Social Tags and Note Board Ribbon Controls" feature.
Activate "Social Tags and Note Board Ribbon Controls" feature and this is a Farm leave feature.

Reference: http://blogs.msdn.com/b/mysite_link_missing_from_web_applications/archive/2011/06/09/mysite-link-missing-from-web-applications.aspx