Strange value_from_object() return value (2L returned instead of unicode string)

I can't seem to figure out what is causing this:  According to the following 2 models

and the 'python manage.py shell' session shown after them, I am getting 2L as a

return value from a certain call when I would expect u'redhat 5.6' or similar.

If anyone has any ideas, please let me know.  I am very stumped at this point.

I include (and query) "Status" just to show normal/expected output from a very

similar query for a field value.

class Status(models.Model):

    name            = models.CharField('Status',

                                       max_length=30,

                                       primary_key=True)

    def __unicode__(self):

        return self.name

class Distro(models.Model):

    # don't make name the primary key, because then it has to be

    # unique and we want to allow multiple items with the same

    # 'name', like ubuntu 10.10 and ubuntu 11.04

    name            = models.CharField('Distro Brand',

                                       help_text='redhat, ubuntu, etc',

                                       max_length=30)

    version         = models.CharField('Distro Version',

                                       help_text='Not kernel version',

                                       max_length=10)

    def __unicode__(self):

        return u"%s %s" % (self.name, self.version)

=============================================================

>>> from hostdb.models import Device, Interface

>>> hostname = 'beijing.mitre.org'

>>> dev = Interface.objects.get(fqdn=hostname).device

>>> dev.status

<Status: Online>

>>> f = dev._meta.get_field('status')

>>> f.value_from_object(dev)

u'Online'

>>> # Super -- this is exactly what I would expect.  Now trouble

>>> dev.distro

<Distro: redhat 5.6>

>>> print dev.distro

redhat 5.6

>>> f = dev._meta.get_field('distro')

>>> f.value_from_object(dev)

2L

>>> # what the hell?

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