UPDATE (08/15/12): The new and maintained home for this information is on our wiki, here: Microsoft Rights Management Client Fix Information.
With the recent Windows 8 RTM I wanted to pull together a list of IRM related fixes. These are fixes for both the client and Office.
Here are some notes about this information.
Office 15 adds the MSIPC client on Windows Vista, Windows 7, and Windows 8. There is no separate install needed and there are no fixes needed.
I’ll be making this information a Wiki post and will maintain it there. I’ll add that link when I get it done.