Hi. I'm having very strange issue. I have updated WP 3.3 to all my websites and first I didn't noticed anything was wrong. But then in one site I noticed Menu uploader does not work. I just can't do anything under media>> Add new. And then I noticed flyout menus doesn't work either, or help buttons, or tinymce. Then I logged in another my site, which is in different webserver and everything works!
Ok after that I went throgh this helpful list.
But nothing. After that I noticed I actually have this same problem in all my sites in this same webserver but not the others servers. I even installed fresh WP 3.3 with clean database, but that didn't work either.
Any ideas what in webserver settings can cause this behaviour? Any help is appreciated. I have already contacted my host, but they are out of ideas too.