Hotmail problem

Anyone using the Firefox browser to access their Hotmail account will be unable to do more than read one message; you can't do anything else after that. Hotmail will give you a message: Please refresh your browser window. When you access your Windows Live Hotmail account from more than one computer, we ask you to sign in again to help keep your account private and secure and that's about all. An error thread has been commenced here, and any users are requested to leave their Hotmail address on there. I've used Hotmail for exactly 9 years, without major problems until now. Accessing the service through Internet Explorer goes without a hitch.