PyMongo leaks memory when inserting records into the database. A script is attached to reproduce the problem assuming that a mongod instance is running locally. The same problem is not reproducible on Mac OS X 10.9.4.

The memory leak occurs rarely ~0.2% of the inserts but it leaks exactly 4096 bytes whenever it occurs (except for the first call to insert where I expect some setup work is being done). Calling `close` on the `MongoClient` object does not release the memory.