I didn't read the JMX1.1 release document to well. All you need to do is set the jmx.serial.form system property to 1.0
If jbossmx were JMX 1.1 compliant then the system property might have worked.
Will jbossmx be able to interact with sun's version?
This is a TODO. The 1.0 spec we worked from didn't
You are the first person to report this. :-)
I'll look at doing the main javax.management.* classes
There are a couple of other changes required for 1.1