As of today 13/02, AD FS 2.0 RU3 is out with a number of updates and hotfixes. This is a cumulative update, so fixes and feature in RU1 and RU2 are contained within.
Some of the changes included:
- Fix for SAML 2.0 ActAs for Relying Parties
- Improved HSM support (performance) for Token Signing and Encryption certificates
- Changes to how signature certificate handling and validation of relying parties is handled
You can apply for the hotfix here:
http://support.microsoft.com/kb/2790338
Some of the above have been pain posts for quite a while now , so more on these after testing…