Patch 5.2.0i Edit
Patch 5.2.0i is the unofficial name for the patch build 16769 that came out later in the same day after the unofficially named "Patch 5.2.0h" build 16760. There is no info on this patch build and there has been no official acknowledgement of the release of this patch build. This client could correspond to the March 21, 2013 slate of hotfixes. It isn't clear why a client patch is needed.
See also Edit