Ever since I updated to 3.1, I have this problem that every time I go to write a post, I have to save the text because when I hit "Save Draft" or "publish", none of the text (or changes) take. There have been a couple times I have lost everything I wrote.
Another thing that happens, if I switch to HTML view, both HTML and WYSIWYG editors show up on the page.
I have disabled all plugins, but the same things happen. Updated to 3.1.1, but no changes.