This patch fixes  variable substitution in "Your new Password" mails in 
Django - without it users get the string "%(site_name)s" in their email.
  --Maximillian Dornseif

Index: django/contrib/admin/templates/registration/password_reset_email.html
===================================================================
--- django/contrib/admin/templates/registration/password_reset_email.html       (revision 3138)
+++ django/contrib/admin/templates/registration/password_reset_email.html       (working copy)
@@ -1,6 +1,6 @@
 {% load i18n %}
  {% trans "You're receiving this e-mail because you requested a password reset" %}
  -{% trans "for your user account at %(site_name)s" %}.
  +{% blocktrans %}for your user account at {{ site_name}}{% endblocktrans %}.
   
    {% blocktrans %}Your new password is: {{ new_password }}{% endblocktrans %}