What you can do and how to fix you have Wordpress 3.1 fatal error upgrade 2011, updating process is failed.
My own story with wordpress 3.1 glitch, Admin WordPress 3.1 Slow Problem which only apply in my admin page.
How to disable admin bar wordpress 3.1 video tutorial to get rid of grey bar or remove the top admin bar by using hide option in wordpress 3.
What are the post format wordPress 3.1? Video tutorial to explain and give a demo how to use Standard, Aside, Gallery post format in wordpress 3.1.
Wordpress 3.1 is available to download and try. Tutorial to install wordpress 3.1 Beta 1
Not yet upgrading wordpress? this tutorial shows you how i did upgrade my wordpress blog, but backing up database and wp-content folder is a must.
Wordpress 3.0 video tutorial how to customize your wordpress 3.0 dashboard to display missing “Visit Site” button link.