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  This is a "hotfix" product. Hotfix products can be installed to 
  incorporate modifications to Zope at runtime without requiring 
  an immediate installation upgrade. Hotfix products are installed 
  just as you would install any other Zope product.

  This hotfix addresses an important security issue that affects all 
  released Zope versions from 2.2.0 up to and including Zope 2.2.4 final.

  The issue involves security registration of "legacy" names for 
  certain object constructors such as the constructors for DTML 
  Method objects. Security was not being applied correctly for the 
  legacy names, making it possible to call those constructors without 
  the permissions that should have been required. This issue could allow 
  anonymous users with enough internal knowledge of Zope to instantiate 
  new DTML Method instances through the Web.

  We *highly* recommend that any Zope site running versions of 
  Zope 2.2.0 up to and including 2.2.4  have this hotfix product installed 
  to mitigate the issue.