Vista - Compile Error: XamlDebuggingInformation parameter is not supported

Hello everybody!

I try my first steps with the june release of .NET framework 3.0
installation.
I installed
- Microsoft Pre-Release Software Microsoft .NET Framework 3.0 - June
2006 CTP
together with
- Microsoft Visual Studio Extensions - Development Tools for .NET
Framework 3.0®-
- Visual Studio 2005 Extensions for Windows WorkFlow Foundation
- Windows SDK for .NET Framework 3.0 June CTP
and
- Microsoft Visual Studio Code Name "Orcas" Community Technology
Preview - Development Tools for .NET Framework 3.0
When I create a "WinFX Windows Application" with the VS-Templates and
try to compile I get the error message:
"The XamlDebuggingInformation parameter is not supported by the
"MarkupCompilePass1" task. Verify the parameter exists on the task, and
it is a settable public instance property."

Does this sound familiar to you? That's ok! So I don't need to feel
that lonely anymore...
Do you know how to fix it? Great! Please tell me!

Thank you very much! Have a nice day!