Hi all,

on behalf of Zope Corporation and the Zope community I am pleased to announce the release of Zope 2.8.0. You can download Zope 2.8.0 from


Some new features of Zope 2.8:

  - ZODB 3.4 with MVCC (multi version concurrency control) support.
    MVCC solves nearly every problem with ZODB read-conflict errors
    which is very important for high-traffic Zope sites.

  - Extension Classes were rewritten as Python new-style classes making
    all features of Python new-style classes available in Zope
    objects. This includes support for cyclic garbage collection.

- Integration of Zope 3 technologies through Five (see http://codespeak.net/z3/five/)

For more information on what is new in this release, see the
CHANGES.txt files for the release:


See also:


Due to the major changes in Extension Classes and ZODB there is a risk that some things are broken or do not work as they should. Backup your Data.fs **before** trying 2.8.0b2.

Please bring all the bugs you have found to the Zope bugtracker:


For more information on the available Zope releases, guidance for selecting
the right distribution and installation instructions, please see:


Thanks to everyone having contributed to this release (hopefully I did not miss any names):

Jim Fulton, Christian Theune, Tim Peters, Fred Drake Jr., Marc Hammond, Sidnei da Silva, Tres Seaver, Stefan Holek, Chris McDonough,

Andreas Jung    (andreas at zopyx dot com)

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