It looks like you don't have the 3.6.7 PATCHES applied. Here are the links.
- PATCH 367-01: Odd effects when 'CSS: Compress' = 'Yes'
- PATCH 367-02 is incorporated in PATCH 367-04
- PATCH 367-03: PHP errors when adding widget areas in index.php
- PATCH 367-04: Hovering over a Post/Page title only shows "Permanent Link to"
- PATCH 367-05: Site Title appended after the 'WordPress SEO by Yoast' title