My Visual Editor options stopped working once I upgraded to 3.1. I tried the page in Firefox 3.6.14 as well as Internet Explorer 8 - not working. I manually re-uploaded the files in the WP source and still no fix. I also tried the
define('CONCATENATE_SCRIPTS', false ); option mentioned in the MasterList and nothing.
In TinyMCE screen, the Visual screen shows only the HTML buttons. If you click HTML, the screen literally shows HTML source with no buttons. Not sure why this is happening but it has put a major crimp on my posting. Please take a look. Thanks!