search the jira more... known issues and on the roadmap for 3.3.2 afaik.
Hum I found nothing in jira refering to this problem.
All I try to do in fact is a manual installation of jBPM over a jBoss 5.0.0 server.
I reverted to jBoss 4.2.3 ant it works well now.
I still don't know what the problem for 5.0.0 is.