JCE error on JBoss 5 on some platforms

During ant install on the above platform you get:

10:11:02,706 ERROR [LogInterceptor] EJBException in method: public abstract void org.ejbca.core.ejb.ca.caadmin.ICAAdminSessionRemote.createC
A(org.ejbca.core.model.log.Admin,org.ejbca.core.model.ca.caadmin.CAInfo) throws org.ejbca.core.model.ca.caadmin.CAExistsException,org.ejbca.
core.model.authorization.AuthorizationDeniedException,org.ejbca.core.model.ca.catoken.CATokenOfflineException,org.ejbca.core.model.ca.catoke
n.CATokenAuthenticationFailedException,java.rmi.RemoteException, causedBy:
java.io.IOException: exception encrypting data - java.security.NoSuchProviderException: JCE cannot authenticate the provider BC
at org.bouncycastle.jce.provider.JDKPKCS12KeyStore.wrapKey(Unknown Source)
at org.bouncycastle.jce.provider.JDKPKCS12KeyStore.engineStore(Unknown Source)
at java.security.KeyStore.store(KeyStore.java:1117)
at org.ejbca.core.model.ca.catoken.CATokenContainerImpl.generateKeys(CATokenContainerImpl.java:390)
at org.ejbca.core.ejb.ca.caadmin.CAAdminSessionBean.createCA(CAAdminSessionBean.java:387)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.jboss.invocation.Invocation.performCall(Invocation.java:386)
at org.jboss.ejb.StatelessSessionContainer$ContainerInterceptor.invoke(StatelessSessionContainer.java:228)
at org.jboss.resource.connectionmanager.CachedConnectionInterceptor.invoke(CachedConnectionInterceptor.java:156)

This does not happen on other versions of JBoss.