Visual Editor Not Working – No Toolbar, Can't Insert Media

Hello,

I’ve just upgraded to WP 3.5 from 3.4.2 and have the following issues:

-When editing a post, the visual tab doesn’t go anywhere, it’s there, I can click it, but it doesn’t load any changes.

-I can click “Add Media”, it’ll pop the media manager (which is a beautiful improvement), I can upload a file, it’ll show up correctly, but when I click “Insert Into Post” nothing happens, but it returns me to the line in the post where I was editing, but no code.

-There’s no tool box at the top of the edit post area. Usually there’s a variety of tools (at least there was previously), was this lost in the new version or is this also broken from my installation?

Troubleshooting steps I’ve taken:

– Disabled *all* plugins
– Activated Twenty Twelve theme
– Manually removed wp-admin and wp-includes folders and re-uploaded from the WordPress 3.5 zip package on wordpress.org.

Server is running Nginx with Varnish. I have cleared the varnish cache since upgrading.