I had problems too upgrading to 3.2.1. No visual editing anymore. I installed Firebug in FF8 and was given two errors regarding “en.js”, a tinymce javascript file. It seems the code is trying to reach “en.js” at two locations : wordpress\wp-includes\js\tinymce\themes\advanced\langs\en.js and wordpress\wp-includes\js\tinymce\langs\en.js. I copied “wp-langs-en.js” sitting in the latter folder to the other locations and the wysiwyg editor came to life again. Probably the name and location of “wp-langs-en.js” is wrongly programmed somewhere in the code. Anybody else resolving the problem with the above ?
djblurb described it similarly.
