I've just installed WWF 1.2 beta, and now Visual Studio (RTM) appears to hang in an endless loop on startup.
I've installed the Windows SDK, WWF platform components, VS WWF extenstions, as well as WinFX and VS WinFX extensions, all in one go.
The only visible sign of an error I can find (apart from VS now being broken :) are some entries in the Application event log (something is complaining about a missing assembly, Microsoft.ReportingServices.QueryDesigners; I'm guessing these originate from NGen as they are dated after the event log entries reporting a successful installation).

Visual Studio hangs after WWF 1.2 is installed
dhToday
I did have beta2 installed previously on this machine, but uninstalled according to guidelines and didn't have any problems (nor any warnings when installing the RTM). I've also installed SQL Server 2005 Express and the management tools from the developer edition. I also still have VS 2003 on the machine.
The System.Workflow assemblies all have the correct version. EnvDTE.dll and EnvDTE80.dll both have file version 8.0.50727.42 (RTM.050727-4200).
And last, yes I did follow the instructions :)
Mohammad Iqubal MSFT
Bratomat
Also, check the assembly versions for the 3 workflow assemblies and EnvDTE in c:\windows\assembly by right clicking and getting the file vesions. Should be 3.0.3203.56
Regards,
Paul
jamesh1971
Regards,
Paul