JavaScript Seems to Fail – (Admin Menu)

Ever since I upgraded to 3.0, it seems that anything that (I think) uses JavaScript won’t work. (And yes, JavaScript is enabled in my browser settings.)

For instance, the sub-menus in the menu on the left won’t open unless I click on them directly (instead of the little arrow), which takes me to the sub-menu’s main page.

I can’t do anything with the widgets.

The editor is broken. The text is always white, and I have highlight it to see it. The normal visual editor section doesn’t show up, and it won’t let me switch to the HTML tab (even though I can put HTML in and it works fine when previewed). Whenever I try to upload something through the page/post editor, it brings me directly to /wp-admin/media-upload.php?post_id=68&type=image&TB_iframe=1.

I can’t use ‘Screen Options’ or ‘Help’ in the top right corner, and also can’t use the drop down left of ‘Howdy, admin’.

This doesn’t happen on just that one 3.0 site, and not just on this computer. In fact, it happens every time I go in the admin panel of a 3.0+ site. It works fine on sites from before 3.0.

I’ve tried it on two different computers with Firefox, and on one of them I tried it on Safari, too.

Are there any work-arounds for this?