I'm pleased to announce the release of ZODB 3.4.1 final. This corresponds to the ZODB that will ship in Zope 2.8.1. You can download a source tarball or Windows installer from: http://zope.org/Products/ZODB3.4 Note that there are two Windows installers, for Python 2.3 (2.3.5 is recommended) and Python 2.4 (2.4.1 is recommended). There have been many bugfixes in various areas since ZODB 3.4. In addition, optional ZEO client cache tracing was badly broken with the introduction of multiversion concurrency control (MVCC) in ZODB 3.3, and ZODB 3.4.1 is the first attempt to repair that. See the news file for details: http://zope.org/Products/ZODB3.4/NEWS.html Note that ZODB 3.4.1 does not support any version of Zope 2.6 or 2.7. Current Zope 2.8 development uses ZODB 3.4.1, and current Zope3 development uses a ZODB 3.5 prerelease. The ZODB 3.3 line is officially retired (3.3.1 final was the last release in the 3.3 line).