verificação do @CSRF falhou. Pedido abortado. no django

Estou seguindo o Django 1.3 Web Development. e para logins, estou recebendo o seguinte erro

Forbidden (403)
CSRF verification failed. Request aborted.
Help
Reason given for failure:
    CSRF token missing or incorrect.

Este é o meu settings.py APPS incluídos. É exatamente como o livro diz que deveria se

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',
    'djangocricket.Cricket',
    'djangocricket.cms'
)

O livro diz que deve conter django.contrib.auth.views.login .. e estou incluindo-o em

urlpatterns = patterns('',
    # Examples:
    url(r'^

e meu registro / login.html ... cópia colada do livro. deve fazer.

<html>
<head>
    <title>Django Bookmarks - User Login</title>
</head>
<h1>User Login</h1>
{% if form.errors %}
    <p>Your username and password didn't match.
        Please try again.</p>
{% endif %}
<form method="post" action=".">
    <p><label for="id_username">Username:</label>
        {{ form.username }}</p>
    <p><label for="id_password">Password:</label>
        {{ form.password }}</p>
    <input type="hidden" name="next" value="/" />
    <input type="submit" value="login" />
</form>
</body>
</html>

o que estou perdendo

, 'djangocricket.Cricket.views.index', name='default'), url(r'^user/(\w+)/

e meu registro / login.html ... cópia colada do livro. deve fazer.

<html>
<head>
    <title>Django Bookmarks - User Login</title>
</head>
<h1>User Login</h1>
{% if form.errors %}
    <p>Your username and password didn't match.
        Please try again.</p>
{% endif %}
<form method="post" action=".">
    <p><label for="id_username">Username:</label>
        {{ form.username }}</p>
    <p><label for="id_password">Password:</label>
        {{ form.password }}</p>
    <input type="hidden" name="next" value="/" />
    <input type="submit" value="login" />
</form>
</body>
</html>

o que estou perdendo

, 'djangocricket.Cricket.views.user_home', name='user home'), url(r'^login/

e meu registro / login.html ... cópia colada do livro. deve fazer.

<html>
<head>
    <title>Django Bookmarks - User Login</title>
</head>
<h1>User Login</h1>
{% if form.errors %}
    <p>Your username and password didn't match.
        Please try again.</p>
{% endif %}
<form method="post" action=".">
    <p><label for="id_username">Username:</label>
        {{ form.username }}</p>
    <p><label for="id_password">Password:</label>
        {{ form.password }}</p>
    <input type="hidden" name="next" value="/" />
    <input type="submit" value="login" />
</form>
</body>
</html>

o que estou perdendo

, 'django.contrib.auth.views.login'), # url(r'^djangocricket/', include('djangocricket.foo.urls')), # Uncomment the admin/doc line below to enable admin documentation: #url(r'^admin/doc/', include('django.contrib.admindocs.urls')), # Uncomment the next line to enable the admin: url(r'^news/', 'djangocricket.cms.views.index', name='index'), #url(r'^news/(?P<slug>[^\.]+).html', 'djangocricket.cms.views.detail', name='get_single_news_item'), url(r'^admin/', include(admin.site.urls)), )

e meu registro / login.html ... cópia colada do livro. deve fazer.

<html>
<head>
    <title>Django Bookmarks - User Login</title>
</head>
<h1>User Login</h1>
{% if form.errors %}
    <p>Your username and password didn't match.
        Please try again.</p>
{% endif %}
<form method="post" action=".">
    <p><label for="id_username">Username:</label>
        {{ form.username }}</p>
    <p><label for="id_password">Password:</label>
        {{ form.password }}</p>
    <input type="hidden" name="next" value="/" />
    <input type="submit" value="login" />
</form>
</body>
</html>

o que estou perdendo

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