Scary, isn't it?
With a brand new Vista and VS2008 on my laptop, I was just about to migrate some old projects of mine in the new studio format. The conversion wizard went smoothly but when I tried to rebuild the accompanying C# website I was greeted by the following dreadful error message:
The CodeDom provider type "Microsoft.VJSharp.VJSharpCodeProvider, VJSharpCodeProvider, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a" could not be located.

That's it. No File, no line, no project. Nowhere to look for the specific problem. Yay!
A check of the web.config and the project references showed nothing suspicious -- google seemed to be the only reasonable option. A...