For the record the same problem also happens with toscawidgets.

>>> from toscawidgets.widgets.forms import validators
>>> help(validators)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/lib/python2.5/site.py", line 351, in __call__
    return pydoc.help(*args, **kwds)
  File "/usr/lib/python2.5/pydoc.py", line 1646, in __call__
    self.help(request)
  File "/usr/lib/python2.5/pydoc.py", line 1690, in help
    else: doc(request, 'Help on %s:')
  File "/usr/lib/python2.5/pydoc.py", line 1481, in doc
    pager(title % desc + '\n\n' + text.document(object, name))
  File "/usr/lib/python2.5/pydoc.py", line 324, in document
    if inspect.ismodule(object): return self.docmodule(*args)
  File "/usr/lib/python2.5/pydoc.py", line 1072, in docmodule
    contents.append(self.document(value, key, name))
  File "/usr/lib/python2.5/pydoc.py", line 325, in document
    if inspect.isclass(object): return self.docclass(*args)
  File "/usr/lib/python2.5/pydoc.py", line 1173, in docclass
    classify_class_attrs(object))
  File "/usr/lib/python2.5/pydoc.py", line 179, in classify_class_attrs
    return map(fixup, inspect.classify_class_attrs(object))
  File "/usr/lib/python2.5/inspect.py", line 246, in classify_class_attrs
    obj = getattr(cls, name)
  File
"/usr/lib/python2.5/site-packages/FormEncode-0.7.1-py2.5.egg/formencode/declarative.py",
line 105, in __get__
    obj = type.singleton()
  File
"/usr/lib/python2.5/site-packages/FormEncode-0.7.1-py2.5.egg/formencode/declarative.py",
line 166, in singleton
    setattr(cls, name, cls(declarative_count=cls.declarative_count))
TypeError: __init__() got an unexpected keyword argument 'declarative_count'