[1.1.X] Fixed #13469 -- Cleaned up the test case from r13085, and added some...

[1.1.X] Fixed #13469 -- Cleaned up the test case from r13085, and added some cache cleanup that matters for Python 2.3. Thanks to Karen and Alex for their help.

Backport of r13095 from trunk.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.1.X@13096 bcc190cf-cafb-0310-a4f2-bffc1f526a37