[regression] Problem in dependency resolution with exclusion, pom parent

See projects in attachement.

Parent projet uses SEAM pom parent, and declares jboss-seam as dependency, excluding javax.el

First project uses parent project, and declares javax.el as dependency
mvn dependency:list on first, you can see javax.el

Second project uses parent project, and declares first project as dependency. It should have javax.el on classpath (because of first project), but it doesn't.
mvn dependency:list on second, javax.el disappears !