Unicode decoding error during rendering a date field

[aodag]

I use fa.jquery-0.9.4

RenderError: An uncaught exception was raised. TypeError: decoding Unicode is not supported - Expression: "field.render()" - Filename: C:\Users\aodag\Documents\works\olive\lib\site-packages\fa.jquery-0.9.4-py2.7.egg\fa\jquery\templates\forms\fieldset.pt - Location: (21:32) - Arguments: repeat: {...} (1) renderer_name: pyramid_formalchemy:templates/forms/fieldset.pt template: <PageTemplateFile - at 0x3f11be0L> F_: <instancemethod translate at 0x41a8360L> renderer_info: <RendererHelper - at 0x642db00L> focus_rendered: True attrs: {...} (1) nothing: <NoneType - at 0x1e291448L> fieldset: <FieldSet - at 0x643ec50L> convert: <function translate at 0x403bac8L> fatypes: <module formalchemy.fatypes at 0x3e1c498L> field: <AttributeField - at 0x627c240L> default: <Placeholder - at 0x4196898L> error: <list - at 0x6470888L> request: <Request - at 0x643e320L> decode: <type unicode at 0x1e2a4150L> macros: <Macros - at 0x6265228L> html: <module formalchemy.helpers at 0x3d275b8L> context: <NoneType - at 0x1e291448L> translate: <function translate at 0x403bac8L> view: <NoneType - at 0x1e291448L>

<< value = self.field.model_value
F_ = self.get_translator(**kwargs)
month_options = [(F_('Month'), 'MM')] + [(unicode(F_('month_%02i' % i), 'utf-8'), str(i)) for i in xrange(1, 13)]
day_options = [(F_('Day'), 'DD')] + [(i, str(i)) for i in xrange(1, 32)]
mm_name = self.name + '__month'

[aadis]

Hitting this as well, using pyramid 1.1 + mako, along with fa.jquery