#3 — ZPTField cannot have a storage type of AnnotationStorage

If you define a ZPTField as having a storage type of AnnotationStorage rendering the field will fail with a message like the following:
Failed example:
    registration1.getEmailResponse(**{'registrant':registrant1})
Exception raised:
    Traceback (most recent call last):
      File "C:\dojo/zope2\lib\python\zope\testing\doctest.py", line 1348, in __r
un
        compileflags, 1) in test.globs
      File "<doctest registration.txt[19]>", line 1, in ?
        registration1.getEmailResponse(**{'registrant':registrant1})
      File "c:\dojo\buildout-cache\eggs\products.archetypes-1.5.10-py2.4.egg\Pro
ducts\Archetypes\ClassGen.py", line 56, in generatedAccessor
        return schema[name].get(self, **kw)
      File "c:\dojo\buildout-cache\eggs\products.templatefields-1.2-py2.4.egg\Pr
oducts\TemplateFields\_field.py", line 123, in get
        return value.pt_render(extra_context={'options': kwargs})
      File "C:\dojo/zope2\lib\python\Products\PageTemplates\ZopePageTemplate.py"
, line 427, in pt_render
        result = PageTemplate.pt_render(self, source, extra_context)
      File "C:\dojo/zope2\lib\python\Products\PageTemplates\PageTemplate.py", li
ne 87, in pt_render
        c = self.pt_getContext()
      File "C:\dojo/zope2\lib\python\Products\PageTemplates\ZopePageTemplate.py"
, line 274, in pt_getContext
        root = self.getPhysicalRoot()
    TypeError: 'str' object is not callable