EJB3 session bean is not bound to JNDI if only "ejb-jar.xml" is used

I have a small EJB3 app (ejb and app client bundled in an EAR file, see attached file) with one session bean and NO annotations, only deployment descriptors.

There is a stateless session bean GeometricModelBean with local and remote interfaces GeometricModelLocal and GeometricModel.

the relevant part of ejb-jar.xml is:
<session>
...
<display-name>GeometricModelBean</display-name>
<ejb-name>GeometricModelBean</ejb-name>
<remote>de.fhw.swtvertiefung.knauf.stateless.GeometricModel</remote>
<local>de.fhw.swtvertiefung.knauf.stateless.GeometricModelLocal</local>
<ejb-class>de.fhw.swtvertiefung.knauf.stateless.GeometricModelBean</ejb-class>
<session-type>Stateless</session-type>
</session>
jboss.xml looks like this:
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE jboss PUBLIC
"-//JBoss//DTD JBOSS 5.0//EN"
"http://www.jboss.org/j2ee/dtd/jboss_5_0.dtd">
<jboss>
<enterprise-beans>
<session>
<ejb-name>GeometricModelBean</ejb-name>
<jndi-name>Test</jndi-name>
<local-jndi-name>TestLocal</local-jndi-name>
</session>
</enterprise-beans>
</jboss>

Console output on deployment is:
21:00:35,125 INFO [JBossASKernel] installing bean: jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3
21:00:35,125 INFO [JBossASKernel] with dependencies:
21:00:35,125 INFO [JBossASKernel] and demands:
21:00:35,125 INFO [JBossASKernel] jboss.ejb:service=EJBTimerService
21:00:35,125 INFO [JBossASKernel] and supplies:
21:00:35,125 INFO [JBossASKernel] jndi:Test
21:00:35,125 INFO [JBossASKernel] Class:de.fhw.swtvertiefung.knauf.stateless.GeometricModelLocal
21:00:35,125 INFO [JBossASKernel] jndi:TestLocal
21:00:35,125 INFO [JBossASKernel] Class:de.fhw.swtvertiefung.knauf.stateless.GeometricModel
21:00:35,125 INFO [JBossASKernel] Added bean(jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3) to KernelDeployment of: StatelessEJB.jar

server.log tells me more:
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) adding class annotation javax.ejb.Stateless to jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3 org.jboss.ejb3.annotation.impl.StatelessImpl@6824d9
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) Adding @Local interface de.fhw.swtvertiefung.knauf.stateless.GeometricModelLocal as specified in metadata
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) Adding @Remote interface de.fhw.swtvertiefung.knauf.stateless.GeometricModel as specified in metadata
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) adding class annotation javax.ejb.Local to jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3 org.jboss.ejb3.annotation.impl.LocalImpl@14b28ec
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) adding class annotation javax.ejb.Remote to jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3 org.jboss.ejb3.annotation.impl.RemoteImpl@16ba2b8
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) adding class annotation org.jboss.ejb3.annotation.SecurityDomain to jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3 SecurityDomainImpl[value=, unauthenticatedPrincipal=anonymous]
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) adding class annotation org.jboss.ejb3.annotation.LocalBinding to jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3 org.jboss.ejb3.annotation.impl.LocalBindingImpl@187f139
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) adding class annotation org.jboss.ejb3.annotation.LocalHomeBinding to jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3 org.jboss.ejb3.annotation.impl.LocalHomeBindingImpl@1edf4be
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) adding class annotation org.jboss.ejb3.annotation.RemoteHomeBinding to jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3 [RemoteHomeBindingImpl:, jndi=Stateless/GeometricModelBean/home]
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) adding class annotation org.jboss.ejb3.annotation.RemoteBinding to jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3 [RemoteBindingImpl:, jndi=Test, stack=, bindUrl=, proxyFactory=RemoteProxyFactory, constructionPoint=org.jboss.ejb3.Ejb3DescriptorHandler.addRemoteJndiAnnotations(Ejb3DescriptorHandler.java:1783)]
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3DescriptorHandler] (RMI TCP Connection(14)-127.0.0.1) Adding org.jboss.ejb3.annotation.RemoteBinding to jboss.j2ee:ear=Stateless.ear,jar=StatelessEJB.jar,name=GeometricModelBean,service=EJB3: [RemoteBindingImpl:, jndi=Test, stack=, bindUrl=, proxyFactory=RemoteProxyFactory, constructionPoint=org.jboss.ejb3.Ejb3DescriptorHandler.addRemoteJndiAnnotations(Ejb3DescriptorHandler.java:1783)]
2008-09-24 21:00:35,093 DEBUG [org.jboss.ejb3.Ejb3AnnotationHandler] (RMI TCP Connection(14)-127.0.0.1) found EJB3: ejbName=GeometricModelBean, class=de.fhw.swtvertiefung.knauf.stateless.GeometricModelBean, type=STATELESS

But I do not find an entry for my bean in the JNDI view, and a lookup from the application client fails with "Test not bound". The client ENC works and can be found in JNDI view.

The same code with annotations and no deployment descriptor files works fine, and this deployment descriptor version works either.

If I add a "business-local" and "business-remote" element to "ejb-jar.xml" and remove "jboss.xml", I see the default JNDI names. Without "business-local" and "business-remote", nothing is found in JNDI view.