I have the same problem.
In my ear. File is an EJB Project (bla.jar)
the structure from the bla.jar file is:
Ant-Version: Apache Ant 1.8.0
Created-By: 1.6.0_19-b04 (Sun Microsystems Inc.)
Class-Path: lib/jar1.jar lib/jar2.jar lib/jar3.jar
When I call a EJB-Method from my Web-App which is also in the ear-file I will get a NoClassDefFoundError
I am using JBoss 5.1.
Thanks in advance!