この質問が何度も聞かれたことは知っていますが、私が見つけて試した回答はどれも役に立ちませんでした。
これらは私の静的ファイルの設定です:
STATIC_ROOT = os.path.abspath(SETTINGS_PATH+'/staticfiles/')
# URL prefix for static files.
# Example: "http://media.lawrence.com/static/"
STATIC_URL = '/staticfiles/'
# 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.
    os.path.join(os.path.dirname(__file__), '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',
) 
そして myapp/urls.py で:
from django.conf.urls import patterns, include, url
from django.conf import settings
from django.contrib import admin
from django.contrib.staticfiles.urls import staticfiles_urlpatterns
admin.autodiscover()
urlpatterns = patterns('',
    # urls
)
urlpatterns += staticfiles_urlpatterns()
Collectstatic は、必要に応じてすべてのファイルを staticfiles/ にコピーし、すべての静的ファイルで 404 を取得します。
私もurls.pyでこれを試しました:
if not settings.DEBUG:
    urlpatterns += patterns('',
        url(r'^staticfiles/(?P<path>.*)$', 'django.views.static.serve',
            {'document_root': settings.STATIC_ROOT}),
    )
これにより、次のようなエラーが発生します。
Resource interpreted as Stylesheet but transferred with MIME type text/html:  "http://localhost:8000/?next=/staticfiles/css/bootstrap.css". localhost:11
Resource interpreted as Stylesheet but transferred with MIME type text/html: "http://localhost:8000/?next=/staticfiles/css/style.css". localhost:12
Resource interpreted as Script but transferred with MIME type text/html: "http://localhost:8000/?next=/staticfiles/js/bootstrap.js". localhost:79
Resource interpreted as Script but transferred with MIME type text/html: "http://localhost:8000/?next=/staticfiles/js/login.js". 
設定の何が問題なのかわかりません。どんなアイデアでも大歓迎です。