Hotmail account is rendered useless

arrrg - yesterday afternoon I opened up my hotmail account and all of the icons are gone so there is no way to log in/off (sign in/sign out logo has now been replaced with a small red "x") - as a matter of fact ALL the icons/images are missing on the opening page (file folders, etc). I can no longer send out email, but I can still receive email at my address.

One thing somewhat unusual - I opened an email from a friend yesterday morning and after the fact noticed that her email address had a upper case "D" in it instead of the usual lower case "d". I have Norton Anti-Virus, AVG and have scanned the heck out of my comp with other security freeware - no infection has been found (housecall, Stinger). There are no bug reports re: hotmail that I can find. Any ideas about what's gone wrong? I hope I've explained this clearly. Thank you.