Incomplete file save of models.FileField.save

[masterclock]

I'm using python2.6 and django 1.0.2

class MyModel(Model):
file = models.FileField(...)
...

mymodel = MyModel(...)

mymodel.file.save(...)

but the saved file is truncated.

when I use admin, the uploaded file is also incomplete.

could anyone give me a reason.

[Xiong Chiamiov]

Are all files truncated? Are they truncated to a certain size? Does
this happen whether or not you're using the development server or
something else (Apache, etc.)? Just to make sure, have you tried
different browsers?

[masterclock]

All files are truncated regargless of its size or file type.
and, each file is truncated to a certain size.
this happens even I don't use a server.
I tried saving a file in "manage.py shell" from local disk to local
disk, but it is still incomplete.