TFS 11 Beta upgrade: Existing workflows that have custom workflow activities using the TFS client OM
Duat, a developer on Team Foundation Build, has written a blog post on how to resolve post-upgrade issues with your build workflow if your 2010 build workflow uses custom workflow activities that use the TFS client object model. Your custom assemblies need update, or else, redirecting Loading your custom assemblies in the TFS 11 build service ...