EPP 5 fails to start due to transaction issues

Issue

We have changed the EPP 5 datasource configuration in gatein-ds.xml to work in our environment, but now starting EPP 5 fails with:

2011-02-23 14:31:29,435 ERROR [exo.jcr.component.core.RepositoryContainer] (main) Repository error
javax.jcr.RepositoryException: You cannot rollback during a managed transaction!: You cannot rollback during a managed transaction!: You cannot rollback during a managed transaction!
     at org.exoplatform.services.jcr.impl.dataflow.persistent.TxIsolatedOperation.perform(TxIsolatedOperation.java:235)
     at org.exoplatform.services.jcr.impl.dataflow.persistent.CacheableWorkspaceDataManager.save(CacheableWorkspaceDataManager.java:526)
     at org.exoplatform.services.jcr.impl.core.ScratchWorkspaceInitializer.initRootNode(ScratchWorkspaceInitializer.java:261)
     at org.exoplatform.services.jcr.impl.core.ScratchWorkspaceInitializer.initWorkspace(ScratchWorkspaceInitializer.java:153)
     at org.exoplatform.services.jcr.impl.RepositoryContainer.initWorkspace(RepositoryContainer.java:478)
     at org.exoplatform.services.jcr.impl.RepositoryContainer.init(RepositoryContainer.java:432)
     at org.exoplatform.services.jcr.impl.RepositoryContainer.start(RepositoryContainer.java:397)
     at org.exoplatform.services.jcr.impl.RepositoryServiceImpl.createRepository(RepositoryServiceImpl.java:160)
     at org.exoplatform.services.jcr.impl.RepositoryServiceImpl.init(RepositoryServiceImpl.java:361)
     at org.exoplatform.services.jcr.impl.RepositoryServiceImpl.start(RepositoryServiceImpl.java:276)