Kyle recently blogged about Facebook changing your e-mail.
Here's his post: http://goo.gl/vYWR7

They figure no one will notice. Yeah right.

To fix this and get your default e-mail back.

1. Go to the about me area of your facebook account. ( Update Info)

2. Edit your Contact info.

3. In the right margin you will see some up and down arrows select the one on the far right.
This will pop up a prompt to show on your timeline.
*Notice that there is a circle and slash through your default address.

4. Select Show on Timeline for your default address and Hide From Timeline for the facebook address.

Now your e-mails will come to your account just as before. If you want to leave the facebook e-mail active, copies will be posted in your message area on Facebook.