If you create a mavenized Seam EAR project using the New Seam Web Project wizard, it will create application.xml that contains the following entries:

...
<module>
<ejb>/test-ejb.jar</ejb>
</module>
<module>
<ejb>/jboss-seam-2.2.1.Final.jar</ejb>
</module>
<module>
<web>
<web-uri>/test.war</web-uri>
<context-root>test</context-root>
</web>
</module>
...

Such a project can be deployed to JBoss AS <= 6.0, but can't to JBoss AS 6.0.0

A workaround is to open the EAR's pom.xml and remove the bundleDir element for ejb and web modules.