Unable to initialize replicaset with mongo driver 1.8.0

I just tried your rewrite of the replicaset configuration, but it does not work for me.

    WARN: Unable to connect to myhost:27017. Mongo::MongoClient.new host or port argument error, host:["myhost:27017"], port:nil

I think the problem is that the latest driver (1.8.0) complains about invalid arguments for the connection initializer. The older drivers (<1.8.0) silently use the default `localhost:27017`, which works but may not be intended...