title: Setting DEBUG = False causes 500 Error
body: <p>Once I change the <code>DEBUG = False</code>, my site will generate 500 (using wsgi &amp; manage.py runserver), and there is no error info in Apache error log and it will run normally when I change <code>debug</code> to <code>True</code> .</p>
  
  <p>I'm using Django 1.5 &amp; Python 2.7.3
  here is Apache access log and without any log in apache error log</p>
  
  <pre><code>www.beta800.net:80 222.247.56.11 - - [28/Feb/2013:13:42:28 +0800] "GET / HTTP/1.1" 500 257 "-" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.97 Safari/537.22"
  www.beta800.net:80 222.247.56.11 - - [28/Feb/2013:13:42:28 +0800] "GET /favicon.ico HTTP/1.1" 500 257 "-" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.97 Safari/537.22"
  www.beta800.net:80 222.247.56.11 - - [28/Feb/2013:13:42:28 +0800] "GET /favicon.ico HTTP/1.1" 500 257 "-" "Mozilla/5.0 (Windows NT 6.2; WOW64) AppleWebKit/537.22 (KHTML, like Gecko) Chrome/25.0.1364.97 Safari/537.22"
  </code></pre>
  
  <p>Here is my settings file:</p>
  
  <pre><code>import os.path    
  DEBUG = False 
  #TEMPLATE_DEBUG = DEBUG
  
  HERE = os.path.dirname(__file__)
  ADMINS = (
      ('admin', 'xyzadmin@qq.com'),
  )
  
  MANAGERS = ADMINS
  
  DATABASES = {
      'default': {
          'ENGINE': 'django.db.backends.mysql', # Add 'postgresql_psycopg2', 'mysql', 'sqlite3' or 'oracle'.
          'NAME': 'zdm',                      # Or path to database file if using sqlite3.
          'USER': 'root',                      # Not used with sqlite3.
          'PASSWORD': 'passwd',                  # Not used with sqlite3.
          'HOST': '',                      # Set to empty string for localhost. Not used with sqlite3.
          'PORT': '',                      # Set to empty string for default. Not used with sqlite3.
      }
  }
  
  # Local time zone for this installation. Choices can be found here:
  # http://en.wikipedia.org/wiki/List_of_tz_zones_by_name
  # although not all choices may be available on all operating systems.
  # In a Windows environment this must be set to your system time zone.
  TIME_ZONE = 'America/Chicago'
  
  # Language code for this installation. All choices can be found here:
  # http://www.i18nguy.com/unicode/language-identifiers.html
  LANGUAGE_CODE = 'en-us'
  
  SITE_ID = 1
  
  # If you set this to False, Django will make some optimizations so as not
  # to load the internationalization machinery.
  USE_I18N = True
  
  # If you set this to False, Django will not format dates, numbers and
  # calendars according to the current locale.
  USE_L10N = True
  
  # If you set this to False, Django will not use timezone-aware datetimes.
  USE_TZ = True
  
  # Absolute filesystem path to the directory that will hold user-uploaded files.
  # Example: "/home/media/media.lawrence.com/media/"
  MEDIA_ROOT = ''
  
  # URL that handles the media served from MEDIA_ROOT. Make sure to use a
  # trailing slash.
  # Examples: "http://media.lawrence.com/media/", "http://example.com/media/"
  MEDIA_URL = ''
  
  # Absolute path to the directory static files should be collected to.
  # Don't put anything in this directory yourself; store your static files
  # in apps' "static/" subdirectories and in STATICFILES_DIRS.
  # Example: "/home/media/media.lawrence.com/static/"
  #STATIC_ROOT = os.path.join(HERE, 'static').replace('\\','/')
  
  # URL prefix for static files.
  # Example: "http://media.lawrence.com/static/"
  STATIC_URL = '/static/'
  #STATIC_ROOT = os.path.join(HERE, 'static').replace('\\','/')
  S= os.path.join(HERE, 'static').replace('\\','/')
  
  # Additional locations of static files
  STATICFILES_DIRS = (
      # Put strings here, like "/home/html/static" or "C:/www/django/static".
      # Always use forward slashes, even on Windows.
      # Don't forget to use absolute paths, not relative paths.
      '/home/zdm/static',
  )
  
  # List of finder classes that know how to find static files in
  # various locations.
  STATICFILES_FINDERS = (
      'django.contrib.staticfiles.finders.FileSystemFinder',
      'django.contrib.staticfiles.finders.AppDirectoriesFinder',
  #    'django.contrib.staticfiles.finders.DefaultStorageFinder',
  )
  
  # Make this unique, and don't share it with anybody.
  SECRET_KEY = '9a7!^gp8ojyk-^^d@*whuw!0rml+r+uaie4ur$(do9zz_6!hy0'
  
  # List of callables that know how to import templates from various sources.
  TEMPLATE_LOADERS = (
      'django.template.loaders.filesystem.Loader',
      'django.template.loaders.app_directories.Loader',
  #     'django.template.loaders.eggs.Loader',
  )
  
  MIDDLEWARE_CLASSES = (
      'django.middleware.common.CommonMiddleware',
      'django.contrib.sessions.middleware.SessionMiddleware',
      'django.middleware.csrf.CsrfViewMiddleware',
      'django.contrib.auth.middleware.AuthenticationMiddleware',
      'django.contrib.messages.middleware.MessageMiddleware',
      # Uncomment the next line for simple clickjacking protection:
      # 'django.middleware.clickjacking.XFrameOptionsMiddleware',
  )
  
  ROOT_URLCONF = 'zdm.urls'
  
  # Python dotted path to the WSGI application used by Django's runserver.
  WSGI_APPLICATION = 'zdm.wsgi.application'
  
  TEMPLATE_DIRS = (
      # Put strings here, like "/home/html/django_templates" or "C:/www/django/templates".
      # Always use forward slashes, even on Windows.
      # Don't forget to use absolute paths, not relative paths.
      '/home/zdm/templates',
  )
  
  INSTALLED_APPS = (
      'django.contrib.auth',
      'django.contrib.contenttypes',
      'django.contrib.sessions',
      'django.contrib.sites',
      'django.contrib.messages',
      'django.contrib.staticfiles',
      # Uncomment the next line to enable the admin:
      'django.contrib.admin',
      # Uncomment the next line to enable admin documentation:
      # 'django.contrib.admindocs',
      'zdm',
      'portal',
      'admin',
      'tagging',
  )
  </code></pre>