You need to add the RequestContext
in your render_to_response
for the context processors to be processed.
In your case:
from django.template.context import RequestContext
context = {'latest': p}
render_to_response('Question/latest.html',
context_instance=RequestContext(request, context))
From the docs:
context_instance
The context instance
to render the template with. By
default, the template will be rendered
with a Context instance (filled with
values from dictionary). If you need
to use context processors, render the
template with a RequestContext
instance instead.