Readme states Appraise should work with Django >1.3, but it does not work with any 1.3 version, because certain symbols imported on urls.py were on django.conf.urls.default on 1.3, but on django.conf.urls on >1.4.
Also, it does not work with >1.5, because the patterns api changed. There is also an open issue with 1.6.
To my best knowledge, it only works with 1.4.20, that will be supported until October 2015.
Can you update the readme to reflect this?