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…