I downloaded WP 2.7 today, installed it following the guide and all went perfect. Was editing the 'Hello World' post, still going perfect.
Then, my friend tried to access the blog and got a 403 forbidden error. I then tried typing in the blog address in a new tab and lo and behold, i get the error to. I tried changing the default theme in my WP Admin in the tab that still works but instead of a preview, i get the 403 error.
Im sure it's something to do with the permissions on my folders / files but i haven't edited them. Also this is a fresh install.
Site is http://matthewjgb.com
Hope someone can help!
EDIT : Also, i have tried this in Firefox 3 and IE7 and both have same error.