column "is_superuser" is of type integer but expression is of type boolean DJANGO Error
The problem is caused by a variable trying to change data types (i.e. from a char field to date-time) in the migration files.  A database like PostgreSQL might not know how to change the variable type.
So, make sure the variable has the same type in all migrations.
I could use some help.  My python 3.4 Django 1.7.4 site worked fine using sqlite.  Now I've moved it to Heroku which uses Postgres.  And when I try to create a user / password i get this error:

column "is_superuser" is of type integer but expression is of type boolean
LINE 1: ...15-02-08 19:23:26.965870+00:00', "is_superuser" = false, "us...
                                                             ^
HINT:  You will need to rewrite or cast the expression.

The last function call in the stack trace is:
/app/.heroku/python/lib/python3.4/site-packages/django/db/backends/utils.py in execute
                return self.cursor.execute(sql, params) ...
▶ Local vars

I don't have access to the base django code,  just the code on my app.  So any help getting this to work would be really helpful.