Now that I am able to compile JBoss 3.2.0-RC2, I was able to get some more information with my own debug statements.
The username=null, password=null is done on the first access to the /jmx-console context. Why is it trying to login as null/null before it prompts me for my login?
I think the real login via my username/password on LDAP is proceeding, just that it is not matching the role correctly.
This causes 2 issues now.