Odd loss of formatting on WP Backend - examples attached

On one of my key sites, we have lost formatting of the backend in the admin panel. This makes our posts have no way to edit except in the text mode. Further, it has pop-up menus in the backend, show just text over what is behind them.

Tried the usual... reinstalled WP in the admin panel, deactivated all plugins, changed to the generic theme 2012, and still this problem persisted.

Any ideas here? This one is driving us crazy!

Did not see a way to upload, so here are two screenshots: