SOLVED -> Exception type = System.MissingMethodException (caused by VisualStudio2010 beta)
Method not found: 'Microsoft.FSharp.Collections.FSharpList`1<!0> - > solved by uninstalling VS2010beta/rc
Method not found: 'Microsoft.FSharp.Collections.FSharpList`1<!0> - > solved by uninstalling VS2010beta/rc