$.browser Undefined Seemingly Causing Faulty Page Display

Something is messing up your queue. Your jQuery URL has 1.8.3 version, while that is neither default in WP 3.9.1 or actual file it points to (1.11.0). Migrate is not showing up for me either, likely because of issues there.

Effectively you are missing jQuery.browser because it was removed in version 1.9+ and migrate is not loaded.