Ignore failing AvalonEdit test.

git-svn-id: svn://svn.sharpdevelop.net/sharpdevelop/trunk@5090 1ccf3a8d-04fe-1044-b7c0-cef0b8235c61

src/Libraries/AvalonEdit/ICSharpCode.AvalonEdit.Tests/WeakReferenceTests.cs

@@ -49,6 +49,8 @@ namespace ICSharpCode.AvalonEdit
 		}
 		
 		[Test]
+		[Ignore(".NET 4.0 Beta 2 seems to cause trouble here. With the same AvalonEdit binary, " +
+		        "this test fails depending on whether it runs in NUnit on .NET 3.5 or .NET 4.0.")]
 		public void DocumentDoesNotHoldReferenceToTextArea()
 		{
 			bool collectedTextArea = false;