Bummer! I definitely have not been using the Twenty Eleven theme, nor have I changed my theme (although I was considering doing so). Perhaps I will try a theme change and see if it begins to work again, or I guess I’ll have to go through and deactive my plugins and see if one of their updaets caused the issue.
I having similar issues with my site Josh. Password just stopped working. You enter the correct password but the pages/posts don’t unlock. Have you found a fix for your issue?!