I have just upgraded to WordPress 2.8. I tried the ‘Upgrade Automatically’ button, but guess what, it failed 🙁

Downloading update from http://wordpress.org/wordpress-2.8.zip
Unpacking the core update
Could not copy file: /wordpress/wp-content/upgrade/core/wordpress/wp-comments-post.php
Installation Failed

So I had to do it manually… At least everything appears to be working now, if you notice any problems, then please let me know.