At startup:
WARNING Init Ambiguous name for method of Products.DateRecurringIndex.index.DateRecurringIndex: 'manage_main' != 'manage'
Why do we need to declare the name manage? Will the ZMI automatically take care of this for us?
See:
https://mail.zope.org/pipermail/zpt/2001-October/002232.html
(Solution for DTML, not for ZPT)
https://mail.zope.org/pipermail/zpt/2001-October/002232.html
Of course, just repeating ourselves and declaring manage and manage_main separately suppresses the warnings, as does setting manage_main.need__name_ = 0