I just updated WordPress on my site from 3.1.3 to 3.3.1. I completely deleted the wp-admin and wp-includes directories and uploaded new ones from a fresh zip I downloaded from WordPress.org.
Whenever I go to the Upload New Media page, it comes up with an error that says "updateMediaForm()" is not defined. I see the function is located in handlers.dev. I searched the entire WordPress zip and do not see one file that contains a SCRIPT reference to this file.
I cannot get this page to work in Chrome, Firefox, or IE8. If I don't have Firebug running, then I don't see the JS errors, but when I click on the Select Files button or Browser Uploader link, nothing happens.
Can someone tell me how to fix this? I've deleted the wp-admin and wp-includes three times and uploaded them and the error never goes away. Is this a WordPress bug?