Comment 1 for bug 854060

Zope 2.13 supports zope.pagetemplate 3.5.x as expressed in its known good version set.

zope.pagetemplate 3.6.1 is currently only compatible with the yet unreleased Zope 4.0. Some unreleased changes on zope.pagetemplate trunk (to be released in 3.6.2) will likely make it backwards compatible. Even though the use of the 3.6.x line with Zope 2.13 isn't and won't be supported.