I just installed 4.6.14 on a test system, and still get the security alert popup message at the top right of the screen, and on the last line of the screen. Is this an error? I cleared caches (Civi & Drupal) but still get the message. I know I can suppress them but I don't think they should be appearing at all.
There is an open issue on this: CRM-18156.
This logic is implemented in
CRM_Utils_Version:: checkBranchForNewVersion() -
Update: Now fixed, cause was identified as data in the pingback / version check feed on CiviCRM.org. See JIRA issue CRM-18156 for details.