redefined save methods not always called when using free admin

[GoClick]

Given something loseley like this

class a(models.Model):

def save(self):

super(a, self).save()

class b(models.Model):

ta = models.ForeignKey(a, edit_inline=models.TABULAR, num_in_admin=5)
def save(self):

super(b, self).save()

when I edit an a in the admin and press save the save method is called. However if I edit the b objects inline the save method for a is not called even if there were changes made to the a object aswell, the object seems to be getting saved with the superclass' save method not the new redefined one.