suddenly the "Add new" function stopped working. It loads the correct page but when I click the "Featured image"(?) link instead of popping up the modal it loads the modal in a separate window. Also the "pop-out" submenus in the WP standard menu on the left stops working when on the "Add new" page. Works on the other pages though.
Any ideas as to why? It has been working before, like just a couple of days ago I managed to add images to slideshows.
Using WP 3.4.2