DeserializationError while loading a datamigration for auth data

[Alexandre Provencio]

Hello guys, I'd like to auto populate my app recently converted to
south, with permission group and user data. However, after generating
a fixture and calling it from the datamigration I'm getting this
error. I've put the steps I'm taking detailed here
http://stackoverflow.com/questions/16470492/deserializationerror-while-loading-a-datamigration-for-auth-data

Any help is welcome.

-Alexandre