Django 1.4: TypeError: get_db_prep_value() got an unexpected keyword argument 'connection'

This was working fine for my Ubuntu 10.04LTE system with Django
1.3.1. It seems broken now in 1.4.

In Django 1.4, I get this error TypeError: get_db_prep_value() got an
unexpected keyword argument 'connection' when saving an image to an
ImageField.

System (installed from Ubuntu Lucid repository packages):
Django 1.4
Python 2.6.5 (r265:79063, Apr 16 2010, 13:57:41)

The model field is defined as: origin_image =
models.ImageField(upload_to='images/origin')
The offending call is: obj.origin_image.save(fbFileName,
ContentFile(input_file.getvalue()))

Traceback (most recent call last):
File "/home/seeker/src/ceeq/seekerapp/management/commands/
addUser.py", line 100, in addPhotos
obj.origin_image.save(fbFileName,
ContentFile(input_file.getvalue()))
File "/usr/local/lib/python2.6/dist-packages/Django-1.4-py2.6.egg/
django/db/models/fields/files.py", line 95, in save
self.instance.save()
File "/usr/local/lib/python2.6/dist-packages/Django-1.4-py2.6.egg/
django/db/models/base.py", line 463, in save
self.save_base(using=using, force_insert=force_insert,
force_update=force_update)
File "/usr/local/lib/python2.6/dist-packages/Django-1.4-py2.6.egg/
django/db/models/base.py", line 551, in save_base
result = manager._insert([self], fields=fields,
return_id=update_pk, using=using, raw=raw)
File "/usr/local/lib/python2.6/dist-packages/Django-1.4-py2.6.egg/
django/db/models/manager.py", line 203, in _insert
return insert_query(self.model, objs, fields, **kwargs)
File "/usr/local/lib/python2.6/dist-packages/Django-1.4-py2.6.egg/
django/db/models/query.py", line 1576, in insert_query
return query.get_compiler(using=using).execute_sql(return_id)
File "/usr/local/lib/python2.6/dist-packages/Django-1.4-py2.6.egg/
django/db/models/sql/compiler.py", line 909, in execute_sql
for sql, params in self.as_sql():
File "/usr/local/lib/python2.6/dist-packages/Django-1.4-py2.6.egg/
django/db/models/sql/compiler.py", line 872, in as_sql
for obj in self.query.objs
File "/usr/local/lib/python2.6/dist-packages/Django-1.4-py2.6.egg/
django/db/models/fields/__init__.py", line 292, in get_db_prep_save
prepared=False)
TypeError: get_db_prep_value() got an unexpected keyword argument
'connection'

This problem was also reported on the django-celery board:
https://github.com/ask/celery/issues/624
But I've realized that for me, it's not a celery issue.

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