Reproducable this way

When seam application application.xml includes

<module>
<java>jboss-el-api.jar</java>
</module>

See these threads for details:

http://www.jboss.com/index.html?module=bb&op=viewtopic&t=108938&start=10&postdays=postDays&postorder=postOrder&highlight=highlight

http://www.jboss.com/index.html?module=bb&op=viewtopic&t=109212&start=0&postdays=postDays&postorder=postOrder&highlight=highlight

At least 4 people independently confirmed it (on windows and linux). It seems looping is hapenning in classloading code which migth indicate
more serious issue than just with seam applications.