Hi Maciej,
I did rebuild the binaries before and that didn't help. I just now re-started jboss, ran drools-guvnor, re-imported the kb and rebuilt the binaries. Then I ran jbpm-console and logged in as krisv, selected the evaluation process and the task showed up as per the quick-start. I completed the task and although the process is running there isn't anything else happening. I logged in as john and mary, no tasks. I'm still seeing the "KnowledgeAgent exception while trying to deserialize KnowledgeDefinitionsPackage" exception along with the MVELDialectRuntimeData errors in the log file.
Jim