I'm pleased to announce the release of ZODB 3.3c1. This corresponds to the ZODB (and ZEO) that we intend to ship with ZopeX3-3.0.0 release candidate 1. You can download a source tarball or Windows installer from: http://zope.org/Products/ZODB3.3 3.3c1 incorporates a slew of small fixes, and one major incompatibility: when a transaction commit fails, all previous versions of ZODB aborted the transaction and implicitly began a new transaction. As discussed on the zope-dev and zodb-dev mailing lists, that can be damaging if one in a sequence of subtransaction commits mistakenly suppresses a commit exception. Starting with ZODB 3.3c1, after a commit fails subsequent attempts to commit, join or register with the transaction will also fail. The failing transaction must instead be explicitly discarded. See the news file for details: http://zope.org/Products/ZODB3.3/NEWS.html The intent is that 3.3c1 will be released again as ZODB 3.3 (final) shortly before the ZopeX3-3.0.0 final release. Note that ZODB 3.3 does not support any version of Zope 2.6 or 2.7.