is there CLR profiler for .NET 4.0 around?

UPDATE: The CLR Profiler for .NET Framework 4 is now available here.

I couldn't find the CLR Profiler for .NET 4.0, but you should be able to use the older version if you set the environment variable: COMPLUS_ProfAPI_ProfilerCompatibilitySetting. For more information see this blog post.

Also note that as of .NET 4.0 the CLR outputs some more information to the Event Log to help you diagnose issues loading profilers. You can easily view these logs with the Event Viewer.

CLR Profile 4.0 can be downloaded here:

http://www.microsoft.com/downloads/en/details.aspx?FamilyID=f4addc9d-be61-4ebc-90b2-5f50812c2037

it looks like the installer is 64bit only, but you can unpack it using 7z and the 32bit version is inside the package.