When doing drop or find on a collection Python returns invalid BSON.
The collection has to be filled with a couple of entries.

The script in the end is an example.

Drop also returns the error but the connection is dropped.

There could be a problem with BSON,
the PHP driver also faults, see php issue https://jira.mongodb.org/browse/PHP-267.

I'm using mongodb from a Qnap server (version 1.8) https://github.com/skrabban/mongo-nonx86.

I haven't tested remote from python because the behavior is similar to the PHP issue mentioned.

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#!/usr/bin/python -w'
# -*- encoding: utf-8

import sys
if len(sys.argv)>1:
   computer = sys.argv[1]
else:
   computer = 'localhost'

from pymongo import Connection
collection = Connection(computer).test.test

collection.drop()

docs = [
   {'nr':1},
   {'dict':{'nr':1,'str':'2'},},
]

for d in docs:
   collection.insert(d)
   for o in collection.find(): print o
   print "..."