From the django 1.1 release notes:
You should no longer use AdminSite.root() to register that admin views. That is, if your URLconf contains the line:
(r'^admin/(.*)', admin.site.root), You should change it to read: (r'^admin/', include(admin.site.urls))
satchmo/apps/satchmo_store/urls/default.py should probably be changed. If I figure out how to use bitbucket, i'll submit a patch.