Oh, that's a tricky one to explain. It depends on the settings of the Mudcat server. On one setting, Mudcat will display "special characters" as they appear. On another setting, ampersand codes are required to display non-ASCII characters correctly.
If I copy Felipa's posts and paste them into an editing box, they will display correctly. But if I paste them into a new message, they will look like they do now. In... unless Max changes the settings, and he has limited ability to do that now.