There is an announcement posted at http://blogs.msdn.com/netservicesannounce/archive/2009/07/07/microsoft-net-services-july-2009-ctp-release-announcement.aspx that a new version of the .NET Services SDK has been released. From what I have seen there have been some changes that might require recompiling code. I will have to take more time to look over the release notes and update my samples.
This seems like a refinement of the previous CTP, as it should, as we are nearing the release of the entire Azure platform.