Debugging A Web Site With A Host Header-VS2008 SP1 Issue with IIS 5/6

If you have downloaded the RTM version of SP1 for Visual Studio 2008, you may get an error when trying to debug a Web Site with a host header on IIS 6 or IIS 5.1. The error message reads: "Unable to start debugging on the web server. An authentication error occurred while communicating with the web server. Please see Help for assistance."