I can not reproduce this. Zope 2.12 uses zope.form 3.6 (as pinned through the download index) -- Zope2 2.12.2 conflicts with zope.formlib 4.0 https://bugs.launchpad.net/bugs/506354 You received this bug notification because you are a member of Zope 2 Developers, which is subscribed to Zope 2.