Flatpage app urls redirect to 404 template if custom handler404 is set and DEBUG = False

[kamelok]

It appears only if DEBUG = False, any url that is not in urls.py (and Flatpage app urls are not) redirect to 404.
If DEBUG = True - Flatpage app work as expected.
If remove handler404 from urls - also Flatpages app work as expected.

core.views.py

def custom_404_view(request):
        return render_to_response("404.html", {'event': Event.objects.get(pk=1)}, context_instance=RequestContext(request))

def custom_500_view(request):
        return render_to_response("500.html", {}, context_instance=RequestContext(request))

urls.py

# Handlers for 404 and 500
handler404 = 'core.views.custom_404_view'
handler500 = 'core.views.custom_500_view'

[Claude Paroz]

My guess is that as your custom_404_view does not return a 404 HTTP code, the fallback middleware does not catch it. Please try to return a HttpResponseNotFound response and reopen if you can still reproduce it.