migration fails for sqlite if TextField default value contains a percentage sign

[mrooney.south@…]

Using South 0.7.6 / Python 2.7.3 / Django 1.4.2, I created a model field like:

email_body = models.TextField?(default="Please download your free report: %LINK%")
another_field = models.BooleanField?(default=False)

A schemamigration --auto successfully created a migration, and did end up creating an email_body column, but will fail trying to create the next "another_field" migration, whatever it may be.

Traceback (most recent call last):
  File "./manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 443, in execute_from_command_line
    utility.execute()
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/django/core/management/__init__.py", line 382, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/django/core/management/base.py", line 196, in run_from_argv
    self.execute(*args, **options.__dict__)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/django/core/management/base.py", line 232, in execute
    output = self.handle(*args, **options)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/management/commands/migrate.py", line 108, in handle
    ignore_ghosts = ignore_ghosts,
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/migration/__init__.py", line 213, in migrate_app
    success = migrator.migrate_many(target, workplan, database)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/migration/migrators.py", line 235, in migrate_many
    result = migrator.__class__.migrate_many(migrator, target, migrations, database)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/migration/migrators.py", line 310, in migrate_many
    result = self.migrate(migration, database)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/migration/migrators.py", line 133, in migrate
    result = self.run(migration)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/migration/migrators.py", line 107, in run
    return self.run_migration(migration)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/migration/migrators.py", line 81, in run_migration
    migration_function()
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/migration/migrators.py", line 57, in <lambda>
    return (lambda: direction(orm))
  File "/Users/michaelrooney/Code/nyr/website/nyr/migrations/0005_auto__add_field_developmenttranslation_email_subject__add_field_develo.py", line 14, in forwards
    keep_default=False)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/db/sqlite3.py", line 31, in add_column
    field.column: self._column_sql_for_create(table_name, name, field, False),
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/db/generic.py", line 44, in _cache_clear
    return func(self, table, *args, **opts)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/db/sqlite3.py", line 103, in _remake_table
    ", ".join(["%s %s" % (self.quote_name(cname), ctype) for cname, ctype in definitions.items()]),
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/south/db/generic.py", line 273, in execute
    cursor.execute(sql, params)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/django/db/backends/util.py", line 44, in execute
    sql = self.db.ops.last_executed_query(self.cursor, sql, params)
  File "/Users/michaelrooney/Code/nyr/env/lib/python2.7/site-packages/django/db/backends/__init__.py", line 603, in last_executed_query
    return smart_unicode(sql) % u_params
TypeError: not enough arguments for format string