I have been having these issues for a long time - when trying to edit/create posts, upload media, etc., the buttons for those functions do nothing (no errors returned). It's happening with multiple browsers (Safari, Firefox, Chrome) and on multiple machines/OS's (OSX 10.7/8, Windows XP).
Example: wanted to upload a document and create a new post. Safari wouldn't work at all (Mac). Could upload media on XP, and create a post, but could not add the media from library to post. Was able to add the media (Mac, Chrome) and create a post, but was unable to edit posting date in an existing post with it.
I don't even know where to begin to look - browser? Java? Flash? Ever since they got rid of the old-school interface option, I've been unable to really work with my site much of the time. Any help would be greatly appreciated!
The blog I need help with is gwchem.wordpress.com.