ZODB 3.4 beta 1 released

I'm pleased to announce the release of ZODB 3.4 beta 1.  This corresponds to
the ZODB that will ship in Zope 2.8b2.  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).

ZODB 3.4b1 contains many bugfixes and new features, including:

- savepoint/rollback support, a powerful generalization of
  subtransactions allowing to revert to any savepoint'ed state
  within a transaction

- auto-synchronization with storages after a transaction commit
  or abort, and at the explict start (transaction.begin()) of a
  transaction

- a way to register callbacks invoked just before a transaction
  starts to commit -- see the new transaction.beforeCommitHook()

- a new release of ZConfig

See the news file for details:

    http://zope.org/Products/ZODB3.4/NEWS.html

Note that ZODB 3.4 does not support any version of Zope 2.6 or 2.7.  Current
Zope 2.8 and Zope 3 development use ZODB 3.4.  The ZODB 3.3 line is
officially retired (3.3.1 final was the last release in the 3.3 line).

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