I did a search on the forum, and just applied these patches, although I still have the problem in IE.
- PATCH 367-01: Odd effects when 'CSS: Compress' = 'Yes'
- PATCH 367-02 is incorporated in BUGFIX 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