Adobe has released update version 2.3 for Lightroom. You can download the versions using the links on the sidebar. It appears the majority of the fixes for this update are related to memory leaks and other items within Windows.
Of real importance is the fix for the artifacts that appeared in version 2.2 when using a Cannon EOS 5D Mk II sRAW file. This should make many of those users happy. Since I use strictly Leica equipment I cannot test this update for the EOS, but leave a comment if you use this model.