I'm using the latest WP version (2.8.5) but I've been having this problem for a while.
When I'm Adding A New Post or Editing a New Post none of the right side menus or below ones works, such as "Add Tags" "Categories" "Publish" "Excerpts" "Customs Fields" Etc. They don't drop down, they don't allow me to add new tags, schedule post, view most used categories. The Publish Button works but thats about it.
Anyone know a fix for the problem?