[MonoDevelop] Test failure when using Linq and .Net 4.0

[Matt Calder]

List,

I created a solution, with a single file:

// BEGIN FILE
using System;
using System.IO;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using NUnit.Framework;

namespace LinqDB
{
    [TestFixture]
    public class LinqDBTests
    {

	[Test]
        public void LinqDBTest()
        {
			Enumerable.Range(1, 1).Select(x => x);
			Assert.That(true);	
        }
    }
}
// END FILE

If I build under 4.0, when I try to run the test, it fails to load
(TestFixtureSetup failed). If I build under 3.5 it works. If I comment
out the line beginning with "Enumerable" it works in both 3.5 and 4.0.
I tried referencing a newer NUnit (the MD built in one is quite old),
but that did not make any difference. Am I hitting known limitations
on what code can be tested when building for 4.0? Any comments
appreciated,

Matt