Can you believe that they are still putting out fixes for the TMG firewall, even though its been put in the ground now for a few years? I suppose they need to do this becasue UAG is still supported. Regardless of the reason, Microsoft has released a rollup hotfix pack – check out the TMG fireall team blog for details
http://blogs.technet.com/b/isablog/archive/2013/11/08/tmg-sp2-rollup-4.aspx
HTH,
Deb