http://msmvps.com/blogs/luisabreu/archive/2007/01/24/future-bits-client-files-what-have-you-done-to-them.aspxWell, it seems like I have another rant: what have you done to the client files of the future bits placed in the installation folder? yep, they're there but they also contain duplicate classes and interfaces registrations. For example, Sys.Preview.IActionenCommunityServer 2008.5 SP2 (Build: 40407.4157)