I upgraded the WordPress installation here at Blógünder Schlock, and was promptly locked out of my ability to administer the system. So I poked my tech guy, he reset my password, and my administrative privileges magically returned to me. This is not your problem. Why should you care? Because if you post comments as a registered user, it's entirely possible that your password has gone AWOL. If you have problems logging in, just use the "Lost my Password" function, and all will be peachy.