I have attempted to use the JyConsole with the latest available jython (2.2 rc3) and there is a problem retrieving the list of methods available after a dot.
I have had a brief look in the source, with replacing Jython 2.1 with 2.2rc3 and it seems that
class is not available (or has changed in some way) and this causes an error in DefaultCompletionAction.java.