When a Seam-Gen generated project is deployed as an ear (compressed or exploded) to the server everything appears to deploy without error. The app can be brought up to the main page but if you click login and then submit the form via the Login button a blank page is rendered.
I have tested this both Seam 2.2.0GA and Seam 2.2.1Nightly.
To reproduce generate a new ear project via seam-gen. deploy to server and navigate to the login.seam page. Fill out the form and click login.