I was just looking at the address page for Dan Aykroyd and when I closed it, to log off my computer, it reappered as a word document and (I didn't try this) it looked like I could edit it
Do you have Word installed as the default web page editor on your computer? If so, you probably hit the edit button by mistake which would bring up the page as a Word document. You could not make any changes to the page without the correct username/password though.