Basically, if you don't put the file extension in the URL and the file exists on the server in the same directory, it will automatically point you to that file. Any idea on what kind of setting this is and whether or not it can be overridden?
I think that has something to do with the application that hosts your site.. and I am sure it is not PHP, it has something to do with the configuration of APACHE if that's what godaddy uses to hosts your files.