Did you ever get an answer on this?
I am having the same problem.. The web seems to indicate the problem is with load time weaving generating a class that doesn't exist on one side or another, but I have both explicitly disabled weaving of the class via an aop.xml and also debug shows that the class is not modified....
[Message sent by forum member 'jerdavis' ]
http://forums.java.net/jive/thread.jspa?messageID=374371