as advised in https://jira.mongodb.org/browse/NODE-771 we switched to 2.2.4, with that being the only change that has been made the driver now crashes with a 'no mongos proxies found in seed list' error:

D:\programming\foo\node_modules\mongodb\lib\mongo_client.js:201
throw err
^
MongoError: no mongos proxies found in seed list
at null.<anonymous> (D:\programming\foo\node_modules\mongodb-core\lib\topologies\mongos.js:304:35)
at g (events.js:260:16)
at emitOne (events.js:77:13)
at emit (events.js:169:7)
at Object.cb (D:\programming\foo\node_modules\mongodb-core\lib\topologies\server.js:265:14)
at D:\programming\foo\node_modules\mongodb-core\lib\connection\pool.js:443:18
at authenticateStragglers (D:\programming\foo\node_modules\mongodb-core\lib\connection\pool.js:399:16)
at null.messageHandler (D:\programming\foo\node_modules\mongodb-core\lib\connection\pool.js:421:5)
at Socket.<anonymous> (D:\programming\foo\node_modules\mongodb-core\lib\connection\connection.js:294:22)
at emitOne (events.js:77:13)

this might be an issue related to mongodb-core