thethemefoundry/twentytwelve — pull request #20 by jeffsebring (2012-04-06 06:24:36+00:00)
Title: Conditional IE Classes, Browser defaults + condtional logic moved to functions.php

Some minor additions for mobile and browser support:

1. Conditional IE classes will help child theme authors support older browsers with more accuracy from the stylesheet. See - http://paulirish.com/2008/conditional-stylesheets-vs-css-hacks-answer-neither/

2. Ask Internet Explorer and Chrome to use the latest rendering engine.

3. Modified meta viewport to prevent mobile browser scaling.

Moved conditional header image logic from the template file to a new function, `twentytwelve_get_header_image()`, in functions.php

Moved front end css and script callbacks from header.php to `twentytwelve_scripts()` in functions.php.