Hi,
I made an sample with Hibernate only, it works..
And the same with Spring3 using "org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean" like this:
orm-config.xml:
Code:
<bean id="sessionFactory"
      class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
      <property name="dataSource" ref="datasource"/>
      <property  name="configurationClass">
          <value>org.hibernate.cfg.AnnotationConfiguration</value>
      </property> 
      <property name="configLocation">
         <value>classpath:hibernate.cfg.xml</value>
      </property>
      <property name="annotatedClasses">
         <list>
            <value>com.xxx.fcr.domain.User</value>
            <value>com.xxx.fcr.domain.Partition</value>
         </list>
      </property>
   </bean>
and in my hibernate.cfg.xml:
Code:
<!-- configuration-->
...
<!-- CONFIGURATION FOR ANNOTATION-->
       <property name="configurationClass">org.hibernate.cfg.AnnotationConfiguration</property> 
<!--mapping-->
      <mapping package="com.xxx.fcr.domain" />
      <mapping class="com.xxx.fcr.domain.User"/>
but it doesn't work... I have exactly the same message (WARN : org.hibernate.cfg.AnnotationBinder - Package not found or wo package-info.java: com.xxx.xxxx. 
Thanks by advance if any idea !