Unexpected Server Error (500) in tutorial

I am running python 3.3.1, django-dev, Windows 7,

dev version of tutorial part 3 -

     Customizing Error Views  

     The 404 (page not found) view

The suggested code works as expected though I have some quibbles about documentation wording.

BUT...

When in settings.py DEBUG= True, django prints the stack trace plus a note advising that this view is displayed because DEBUG is set to True.

In settings.py, I see:

# SECURITY WARNING: don't run with debug turned on in production!

DEBUG = True

Makes sense, besides I have created a 404.html and put it in the right place, and I want to see it displayed

When I Set DEBUG=False, I then get "Server Error (500)" not 404.

With some experimentation, I discovered that if I set DEBUG=False the tutorial app appears to always fail with Server Error 500. As a test, I went back to tutorial part 1. created a new minimal project, confirmed that it worked, then set DEBUG=False. and voila I get Server Error (500) again.

That is:

• DEBUG = True, in debug mode - the code works without error
  
• DEBUG = False, in production mode - the code fails Server Error (500)
  

Aside from my setting DEBUG to False, this is all django generated code.

I am a django newbie, but this feels like a bug.  

Checking the IRC archives I see more than one question about cryptic Server Error (500) occurrences.

Comments?

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