MongoDB 2.2.2 has been released.
This version fixes a few issues in 2.2.1 and is a recommended upgrade for all users.
Notable Changes:
* Fix for upgrading replica set secondaries to 2.2.1 from a prior version of MongoDB
* Improved performance and reliability flushing to data files for Windows users on Azure
* The top command was recording commands as queries
* Add a top level option in replica sets to disable chaining
As always, please let us know of any issues,
-Dan