thriftytravelmama - the problem started for me about a month ago but was intermittent to begin with, every third or fourth post I would have to refresh two or three times to activate everything.
Then it started happening on every post (also noticed Stats summary on dashboard didn't load - constant loading graphic). So I made my first comment in these forums and waited.
Nothing - so posted again. By now it is killing me as a single post can take half an hour with all the faffing about with refreshes, copying content and reloading, try to add tags - button unresponsive, try to add media, button unresponsive.
A good way to check, before you start writing a post is to hover over some of the menu items on the left. If there is a submenu (tools, posts, appearance) you should see it. However, if it isn't there it means the scripts are not attached and nothing will work so refresh until the submenus work, then write your post.
Another temp solution I found is to write it, title it and publish it. Then go back to Edit the post. Stuff usually works in Edit mode so you can then add your media, tags etc.
Not ideal, it's obviously broken, but will get you posting again.
Hopefully SOMEONE FROM WORDPRESS will take a look into it.
By the way, what browser are you using? I use Chrome but have tried in IE, Firefox and Opera and, after first few posts, the problem appears in them all.