The wizard for adding server has changed a little bit.
In this scenario everything but your mail address and password are "guessed" by MyOE. It's a little bit easier and faster to configure.
There is also a "Test" button on the server settings, so you can be sure it works before closing the window.
MyOE will also create an identity for your new mail account, this way you'll be able to send mail with your mail address as the from/reply-to field of your mails.
The server list dialog, also changed a little bit, it's easier, more clear.