Guys, FYI, I've just run the Hibernate trunk (3.4.0-SNAPSHOT)'s cache- jbosscache2 module test suite with 3.0.0.CR1 and it passed 100%. But this uses Optimistic Locking and Pessimistic Locking. The next step would be in creating a cache-jbosscache3 module, along with tests for MVCC. Cheers, -- Manik Surtani Lead, JBoss Cache manik(a)jboss.org